diff --git a/trunk/CHANGELOG.txt b/trunk/CHANGELOG.txt
index b2a013a0b..f9120a86a 100644
--- a/trunk/CHANGELOG.txt
+++ b/trunk/CHANGELOG.txt
@@ -23,6 +23,7 @@ Process Hacker
    * #2845427 - "Indicator integer overflow"
    * #2847691 - "Apply button bug"
    * #2849052 - "not defined by current visual style"
+   * #2863305 - "Unhandled exception in comparer"
    * Critical KProcessHacker denial-of-service security issues
    * Incorrect menu items for System threads
    * Crash when viewing error details in the event 
diff --git a/trunk/ProcessHacker/Components/ProcessTree/ProcessTreeModel.cs b/trunk/ProcessHacker/Components/ProcessTree/ProcessTreeModel.cs
index 4264d4782..745c4d3b8 100644
--- a/trunk/ProcessHacker/Components/ProcessTree/ProcessTreeModel.cs
+++ b/trunk/ProcessHacker/Components/ProcessTree/ProcessTreeModel.cs
@@ -237,6 +237,15 @@ namespace ProcessHacker
 
                 nodes.Sort(new Comparison<ProcessNode>(delegate(ProcessNode n1, ProcessNode n2)
                     {
+                        // We have a problem here - the GdiHandlesNumber and UserHandlesNumber 
+                        // properties are dynamically retrieved, so if n1 == n2 we may end up 
+                        // getting different values for the same process due to the timing.
+                        // If we do, then Array.Sort will throw an exception.
+                        //
+                        // The temporary HACK used here is to return 0 whenever n1 == n2.
+                        if (n1 == n2)
+                            return 0;
+
                         switch (sortC)
                         {
                             case "name":