diff --git a/src/buildCommon.js b/src/buildCommon.js
index e927d134..35633679 100644
--- a/src/buildCommon.js
+++ b/src/buildCommon.js
@@ -330,11 +330,13 @@ const makeLineSpan = function(
     className: string,
     options: Options,
 ) {
-    // Fill the entire span instead of just a border. That way, the min-height
-    // value in katex.less will ensure that at least one screen pixel displays.
-    const line = stretchy.ruleSpan(className, options);
-    line.height = options.fontMetrics().defaultRuleThickness;
-    line.style.height = line.height + "em";
+    // Return a span with an SVG image of a horizontal line. The SVG path
+    // fills the middle fifth of the span. We want an extra tall span
+    // because Chrome will sometimes not display a span that is 0.04em tall.
+    const lineHeight = options.fontMetrics().defaultRuleThickness;
+    const line = stretchy.ruleSpan(className, lineHeight, options);
+    line.height = lineHeight;
+    line.style.height = 5 * line.height + "em";
     line.maxFontSize = 1.0;
     return line;
 };
diff --git a/src/environments/array.js b/src/environments/array.js
index a6e4cf65..9de2b402 100644
--- a/src/environments/array.js
+++ b/src/environments/array.js
@@ -199,7 +199,7 @@ const htmlBuilder = function(group, options) {
             }
 
             if (colDescr.separator === "|") {
-                const separator = stretchy.ruleSpan("vertical-separator",
+                const separator = stretchy.ruleSpan("vertical-separator", 0.05,
                     options);
                 separator.style.height = totalHeight + "em";
                 separator.style.verticalAlign =
diff --git a/src/functions/genfrac.js b/src/functions/genfrac.js
index fff12fa9..a2d6423a 100644
--- a/src/functions/genfrac.js
+++ b/src/functions/genfrac.js
@@ -126,7 +126,7 @@ defineFunction({
         }
 
         let frac;
-        if (ruleWidth === 0) {
+        if (!rule) {
             // Rule 15c
             const candidateClearance =
                 (numShift - numerm.depth) - (denomm.height - denomShift);
@@ -166,8 +166,12 @@ defineFunction({
                 positionType: "individualShift",
                 children: [
                     {type: "elem", elem: denomm, shift: denomShift},
-                    // $FlowFixMe `rule` cannot be `null` here.
-                    {type: "elem", elem: rule,   shift: midShift},
+                    // The next line would ordinarily contain "shift: midShift".
+                    // But we put the rule into a a span that is 5 rules tall,
+                    // to overcome a Chrome rendering issue. Put another way,
+                    // we've replaced a kern of width = 2 * ruleWidth with a
+                    // bottom gap in the SVG = 2 * ruleWidth.
+                    {type: "elem", elem: rule,   shift: midShift + 2 * ruleWidth},
                     {type: "elem", elem: numerm, shift: -numShift},
                 ],
             }, options);
diff --git a/src/functions/overline.js b/src/functions/overline.js
index e6f3eab5..93165804 100644
--- a/src/functions/overline.js
+++ b/src/functions/overline.js
@@ -34,9 +34,13 @@ defineFunction({
             positionType: "firstBaseline",
             children: [
                 {type: "elem", elem: innerGroup},
-                {type: "kern", size: 3 * line.height},
-                {type: "elem", elem: line},
+                // The kern on the next line would ordinarily be 3 * line.height
+                // But we put the line into a span that is 5 lines tall, to
+                // overcome a Chrome rendering issue. The SVG has a space in
+                // the bottom that is 2 lines high. That and the 1-line-high
+                // kern sum up to the same distance as the old 3 line kern.
                 {type: "kern", size: line.height},
+                {type: "elem", elem: line},
             ],
         }, options);
 
diff --git a/src/functions/underline.js b/src/functions/underline.js
index 79cbb0f7..2d64a91a 100644
--- a/src/functions/underline.js
+++ b/src/functions/underline.js
@@ -24,7 +24,7 @@ defineFunction({
         // Build the inner group.
         const innerGroup = html.buildGroup(group.value.body, options);
 
-        // Create the line above the body
+        // Create the line to go below the body
         const line = buildCommon.makeLineSpan("underline-line", options);
 
         // Generate the vlist, with the appropriate kerns
@@ -32,9 +32,11 @@ defineFunction({
             positionType: "top",
             positionData: innerGroup.height,
             children: [
-                {type: "kern", size: line.height},
+                // The SVG image is 5x as tall as the line.
+                // The bottom 2/5 of the image is blank and acts like a kern.
+                // So we omit the kern that would otherwise go at the bottom.
                 {type: "elem", elem: line},
-                {type: "kern", size: 3 * line.height},
+                {type: "kern", size: 5 * line.height},
                 {type: "elem", elem: innerGroup},
             ],
         }, options);
diff --git a/src/stretchy.js b/src/stretchy.js
index e8165a1e..d0ec7d07 100644
--- a/src/stretchy.js
+++ b/src/stretchy.js
@@ -326,16 +326,53 @@ const encloseSpan = function(
     return img;
 };
 
-const ruleSpan = function(className: string, options: Options): domTree.span {
-    // Get a big square image. The parent span will hide the overflow.
-    const pathNode = new domTree.pathNode('bigRule');
-    const svg =  new domTree.svgNode([pathNode], {
-        "width": "400em",
-        "height": "400em",
-        "viewBox": "0 0 400000 400000",
-        "preserveAspectRatio": "xMinYMin slice",
-    });
-    return buildCommon.makeSpan([className, "hide-tail"], [svg], options);
+const ruleSpan = function(className: string, lineThickness: number,
+    options: Options): domTree.span {
+
+    // Get a span with an SVG line that fills the middle fifth of the span.
+    // We're using an extra wide span so Chrome won't round it down to zero.
+
+    const lines = [];
+    let svgNode;
+    if (className === "vertical-separator") {
+        // Apply 2 brush strokes for sharper edges on low-res screens.
+        for (let i = 0; i < 2; i++) {
+            lines.push(new domTree.lineNode({
+                "x1": "5",
+                "y1": "0",
+                "x2": "5",
+                "y2": "10",
+                "stroke-width": "2",
+            }));
+        }
+
+        svgNode = new domTree.svgNode(lines, {
+            "width": "0.25em",
+            "height": "100%",
+            "viewBox": "0 0 10 10",
+            "preserveAspectRatio": "none",
+        });
+
+    } else {
+        for (let i = 0; i < 2; i++) {
+            lines.push(new domTree.lineNode({
+                "x1": "0",
+                "y1": "5",
+                "x2": "10",
+                "y2": "5",
+                "stroke-width": "2",
+            }));
+        }
+
+        svgNode = new domTree.svgNode(lines, {
+            "width": "100%",
+            "height": 5 * lineThickness + "em",
+            "viewBox": "0 0 10 10",
+            "preserveAspectRatio": "none",
+        });
+    }
+
+    return buildCommon.makeSpan([className], [svgNode], options);
 };
 
 export default {
diff --git a/src/svgGeometry.js b/src/svgGeometry.js
index 5832c57c..72ca2a9e 100644
--- a/src/svgGeometry.js
+++ b/src/svgGeometry.js
@@ -5,10 +5,6 @@
  */
 
 const path: {[string]: string} = {
-    // bigRule provides a big square image for frac-lines, etc.
-    // The actual rendered rule is smaller, controlled by overflow:hidden.
-    bigRule: 'M0 0 h400000 v400000 h-400000z M0 0 h400000 v400000 h-400000z',
-
     // sqrtMain path geometry is from glyph U221A in the font KaTeX Main
     sqrtMain: `M95 622c-2.667 0-7.167-2.667-13.5
 -8S72 604 72 600c0-2 .333-3.333 1-4 1.333-2.667 23.833-20.667 67.5-54s
diff --git a/static/katex.less b/static/katex.less
index 78f3211a..e18df4f4 100644
--- a/static/katex.less
+++ b/static/katex.less
@@ -56,26 +56,26 @@
     .strut {
         display: inline-block;
     }
-    
+
     // Text font weights
     .textbf {
         font-weight: bold;
     }
-    
+
     // Text font shapes.
     .textit {
         font-style: italic;
     }
-    
+
     // Text font families.
     .textrm {
         font-family: KaTeX_Main;
     }
-    
+
     .textsf {
         font-family: KaTeX_SansSerif;
     }
-    
+
     .texttt {
         font-family: KaTeX_Typewriter;
     }
@@ -85,7 +85,7 @@
         font-family: KaTeX_Math;
         font-style: italic;
     }
-    
+
     .mathrm {
         font-style: normal;
     }
@@ -327,26 +327,6 @@
         }
     }
 
-    // Set a min-height for some horizontal lines so their display
-    // will show at least one screen pixel.
-    @media screen {
-        .mfrac .frac-line,
-        .overline .overline-line,
-        .underline .underline-line {
-            min-height: 1px;
-        }
-    }
-
-    // Modify min-height for retina displays. Don't force two screen pixels.
-    @media screen and (-webkit-min-device-pixel-ratio: 2.0),
-        screen and (min-resolution: 192dpi) {
-        .mfrac .frac-line,
-        .overline .overline-line,
-        .underline .underline-line {
-            min-height: 0.5px;
-        }
-    }
-
     .mspace {
         display: inline-block;
 
@@ -567,20 +547,9 @@
     .mtable {
         .vertical-separator {
             display: inline-block;
-            margin: 0 -0.025em;
-            width: 0.05em;
-
-            // Set a min-width so it will display at least one screen pixel.
-            @media screen {
-                min-width: 1px;
-            }
-
-            // Modify min-width for retina displays. Don't force two screen pixels.
-            @media screen and (-webkit-min-device-pixel-ratio: 2.0),
-                screen and (min-resolution: 192dpi) {
-                min-width: 0.5px;
-            }
-        }
+            margin: 0 -0.125em;     // The ink in the rule is actually 0.05em wide.
+            width: 0.25em;          // We put it in a 0.25em wide span to overcome
+        }                           // a Chrome rendering issue.
 
         .arraycolsep {
             display: inline-block;
@@ -617,6 +586,10 @@
         }
     }
 
+    .vertical-separator svg {
+        width: 0.25em;
+    }
+
     // Define CSS for image whose width will match its span width.
     .stretchy {
         width: 100%;
diff --git a/test/screenshotter/images/ArrayMode-chrome.png b/test/screenshotter/images/ArrayMode-chrome.png
index 1859b946..c7531dab 100644
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