diff -rupN module.orig/Projects/src/Projects/Model/Project.php module/Projects/src/Projects/Model/Project.php
--- module.orig/Projects/src/Projects/Model/Project.php	2016-06-27 10:08:02.000000000 +0000
+++ module/Projects/src/Projects/Model/Project.php	2016-06-27 10:08:17.000000000 +0000
@@ -815,7 +815,7 @@ class Project extends AbstractKey
                     if ($path[0] != '"' || substr($path, -1) != '"') {
                         $path = '"' . $path . '"';
                     }
-                    $paths[] = $path;
+                    $paths[] = strtolower($path);
                 }
 
                 $maps[] = array(
@@ -828,7 +828,7 @@ class Project extends AbstractKey
 
         // if we can cheaply query the common path (won't work on shelved changes)
         // remove any projects/branches which clearly won't be affected
-        $path = $change->isSubmitted() ? $change->getPath(false) : null;
+        $path = $change->isSubmitted() ? strtolower($change->getPath(false)) : null;
         if ($path) {
             $pathMap = new \P4_Map((array) $path);
             foreach ($maps as $key => $map) {
@@ -884,7 +884,7 @@ class Project extends AbstractKey
 
                 // remove the trailing '#rev action' text and see which
                 // project/branch maps this file fits under (if any)
-                $file = substr($data, 0, strrpos($data, '#'));
+                $file = strtolower(substr($data, 0, strrpos($data, '#')));
                 foreach ($maps as $key => $map) {
                     // if the map includes this file add the project/branch to affected and
                     // remove this map so we don't waste time on future files checking it