eclipse Helios, J2EE perspective, file & folder name shown as null

Hello everyone on stackoverflow,

I've tried to test out the new and latest version of eclipse, Helio. After the installation, i install a nightly build of SpringSource toolsuite by following their instruction.

after the update, every works fine. but when i load my ex开发者_如何学Goisting project from SVN, on the "Project Explorer" view, all file and folder other than the java source category, their name are shown as null.

This problem only happens when i work within the J2EE perspective. when i switch to other perspective, i don't see such problem.

Anyone here has any idea about this?

Thanks,