UPGRADE in aquarium-0.4.4 vs UPGRADE in aquarium-0.5.1

@@ -1,9 +1,19 @@
-== Updating to Aquarium-0.4.0
+== Updating to Aquarium-0.5.X
 
-This release is fully backwards-compatible with previous releases. It expands
-the API slightly and adds internal improvements to better support JRuby. There
-should be no upgrade issues. 
+This release introduces a few small API changes that are described in 
+CHANGES. The primary goal of the release is to add full support for 
+Ruby 1.9.3 and JRuby 1.6.7.
+
+It was not tested on early versions of Ruby 1.9 and JRuby 1.X, so users 
+of earlier releases should use caution upgrading. Post any issues to the 
+GitHub project.
+
+== Updating to Aquarium-0.4.X
+
+This release is fully backwards-compatible with previous releases. It 
+expands the API slightly and adds internal improvements to better support 
+JRuby. There should be no upgrade issues. 
 
 == Updating to Aquarium-0.3.1
 
 There should be no upgrade issues with this release. However, the enhancement 
 #17565 now ensures that a JoinPoint is only specified with one type and a type