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I created java project and added src folder from ant module under Java Sources component. Then I created another java project and added the same src dir under its Java Sources component. Many messages about clashing JDOs were then printed to console after expanding any parts of sources. Part of that "dump" is attached.
Created attachment 7075 [details] CLASH dump from console
This problem is caused by looks which try to get context of project for object they visualize. After finishing issue #23270 all looks will get the project context automaticaly and those clashes will disappear. *** This issue has been marked as a duplicate of 23270 ***
Verified.