I have found two issues while working with MyEclipse 7 M2.
1. After opening ApplicationResources.properties file that is arouch 300K, MyEclipse hangs and I have to use the task manager to kill the application.
2. When MyEclipse goes to validate my project, it uses up to 508M of the 512M setup as the max in the myeclipse.ini file. Then when I try to use the garbage collector to try to lower the memory usage, it goes down very little even though I have no editors open.