diff --git a/solr/CHANGES.txt b/solr/CHANGES.txt
index 96a781cae4e..7b3920e6300 100644
--- a/solr/CHANGES.txt
+++ b/solr/CHANGES.txt
@@ -152,6 +152,28 @@ Other Changes
 * SOLR-7645: Remove explicitly defined request handlers from example and test solrconfig's that are
   already defined implicitly, such as /admin/ping, /admin/system, and several others.  (ehatcher)
 
+==================  5.2.1 ==================
+
+Consult the LUCENE_CHANGES.txt file for additional, low level, changes in this release
+
+Versions of Major Components
+---------------------
+Apache Tika 1.7
+Carrot2 3.9.0
+Velocity 1.7 and Velocity Tools 2.0
+Apache UIMA 2.3.1
+Apache ZooKeeper 3.4.6
+Jetty 9.2.10.v20150310
+
+Detailed Change List
+----------------------
+
+Bug Fixes
+----------------------
+
+* SOLR-7588: Fix javascript bug introduced by SOLR-7409 that breaks the
+  dataimport screen in the admin UI. (Bill Bell via Shawn Heisey)
+
 ==================  5.2.0 ==================
 
 Consult the LUCENE_CHANGES.txt file for additional, low level, changes in this release
diff --git a/solr/webapp/web/js/lib/naturalSort.js b/solr/webapp/web/js/lib/naturalSort.js
index 896233a1182..6f052e996f2 100644
--- a/solr/webapp/web/js/lib/naturalSort.js
+++ b/solr/webapp/web/js/lib/naturalSort.js
@@ -1,5 +1,4 @@
 /*
-
 naturalSort.js
 - by Jim Palmer and other contributors
 
@@ -24,62 +23,60 @@ AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 SOFTWARE.
-
 */
 
-#     naturalSort.js 0.7.0
-#     https://github.com/jarinudom/naturalSort.js
-#     (c) 2011 Jim Palmer and other contributors
-#     naturalSort.js may be freely distributed under the MIT license.
-window.naturalSort = (a, b) ->
-  re = /(^([+\-]?(?:0|[1-9]\d*)(?:\.\d*)?(?:[eE][+\-]?\d+)?)?$|^0x[0-9a-f]+$|\d+)/g
-  sre = /(^[ ]*|[ ]*$)/g
-  dre = /(^([\w ]+,?[\w ]+)?[\w ]+,?[\w ]+\d+:\d+(:\d+)?[\w ]?|^\d{1,4}[\/\-]\d{1,4}[\/\-]\d{1,4}|^\w+, \w+ \d+, \d{4})/
-  hre = /^0x[0-9a-f]+$/i
-  ore = /^0/
-  i = (s) ->
-    naturalSort.insensitive and ('' + s).toLowerCase() or '' + s
+//    naturalSort.js 0.7.0
+//    https://github.com/jarinudom/naturalSort.js
+//    (c) 2011 Jim Palmer and other contributors
+//    naturalSort.js may be freely distributed under the MIT license.
+//    Generated by CoffeeScript 1.7.1
+(function() {
+  window.naturalSort = function(a, b) {
+    var cLoc, dre, hre, i, numS, oFxNcL, oFyNcL, ore, re, sre, x, xD, xN, y, yD, yN;
+    re = /(^([+\-]?(?:0|[1-9]\d*)(?:\.\d*)?(?:[eE][+\-]?\d+)?)?$|^0x[0-9a-f]+$|\d+)/g;
+    sre = /(^[ ]*|[ ]*$)/g;
+    dre = /(^([\w ]+,?[\w ]+)?[\w ]+,?[\w ]+\d+:\d+(:\d+)?[\w ]?|^\d{1,4}[\/\-]\d{1,4}[\/\-]\d{1,4}|^\w+, \w+ \d+, \d{4})/;
+    hre = /^0x[0-9a-f]+$/i;
+    ore = /^0/;
+    i = function(s) {
+      return naturalSort.insensitive && ('' + s).toLowerCase() || '' + s;
+    };
+    x = i(a).replace(sre, '') || '';
+    y = i(b).replace(sre, '') || '';
+    xN = x.replace(re, '\u0000$1\u0000').replace(/\0$/, '').replace(/^\0/, '').split('\u0000');
+    yN = y.replace(re, '\u0000$1\u0000').replace(/\0$/, '').replace(/^\0/, '').split('\u0000');
+    xD = parseInt(x.match(hre), 16) || (xN.length !== 1 && x.match(dre) && Date.parse(x));
+    yD = parseInt(y.match(hre), 16) || xD && y.match(dre) && Date.parse(y) || null;
+    oFxNcL = void 0;
+    oFyNcL = void 0;
+    if (yD) {
+      if (xD < yD) {
+        return -1;
+      }
+      if (xD > yD) {
+        return 1;
+      }
+    }
+    cLoc = 0;
+    numS = Math.max(xN.length, yN.length);
+    while (cLoc < numS) {
+      oFxNcL = !(xN[cLoc] || '').match(ore) && parseFloat(xN[cLoc]) || xN[cLoc] || 0;
+      oFyNcL = !(yN[cLoc] || '').match(ore) && parseFloat(yN[cLoc]) || yN[cLoc] || 0;
+      if (isNaN(oFxNcL) !== isNaN(oFyNcL)) {
+        return (isNaN(oFxNcL) ? 1 : -1);
+      } else if (typeof oFxNcL !== typeof oFyNcL) {
+        oFxNcL += '';
+        oFyNcL += '';
+      }
+      if (oFxNcL < oFyNcL) {
+        return -1;
+      }
+      if (oFxNcL > oFyNcL) {
+        return 1;
+      }
+      cLoc++;
+    }
+    return 0;
+  };
 
-  # convert all to strings strip whitespace
-  x = i(a).replace(sre, '') or ''
-  y = i(b).replace(sre, '') or ''
-
-  # chunk/tokenize
-  xN = x.replace(re, '\u0000$1\u0000').replace(/\0$/, '').replace(/^\0/, '').split('\u0000')
-  yN = y.replace(re, '\u0000$1\u0000').replace(/\0$/, '').replace(/^\0/, '').split('\u0000')
-
-  # numeric, hex or date detection
-  xD = parseInt(x.match(hre), 16) or (xN.length isnt 1 and x.match(dre) and Date.parse(x))
-  yD = parseInt(y.match(hre), 16) or xD and y.match(dre) and Date.parse(y) or null
-  oFxNcL = undefined
-  oFyNcL = undefined
-
-  # first try and sort Hex codes or Dates
-  if yD
-    return -1 if xD < yD
-    return 1  if xD > yD
-
-  # natural sorting through split numeric strings and default strings
-  cLoc = 0
-  numS = Math.max(xN.length, yN.length)
-
-  while cLoc < numS
-    # find floats not starting with '0', string or 0 if not defined (Clint Priest)
-    oFxNcL = !(xN[cLoc] || '').match(ore) && parseFloat(xN[cLoc]) || xN[cLoc] || 0
-    oFyNcL = !(yN[cLoc] || '').match(ore) && parseFloat(yN[cLoc]) || yN[cLoc] || 0
-
-    # handle numeric vs string comparison - number < string - (Kyle Adams)
-    if isNaN(oFxNcL) != isNaN(oFyNcL)
-      return (if (isNaN(oFxNcL)) then 1 else -1)
-
-    # Rely on string comparison of different types - i.e. '02' < 2 != '02' < '2'
-    else if typeof oFxNcL != typeof oFyNcL
-      oFxNcL += ''
-      oFyNcL += ''
-
-    return -1 if oFxNcL < oFyNcL
-    return 1  if oFxNcL > oFyNcL
-
-    cLoc++
-
-  return 0
+}).call(this);