I was sure i blogged this but a search says different. Anyway Javalobby has a detailed thread on how to Managing Multiple Eclipse Installations.The reason i bring this up is that after my upgrade to Eclipse RC3 yesterday Eclipse had trouble seeing my pluggins. To get this to work i had to remove site.xml from my main default Eclipse folder so the only file it had in there was the .eclipseextension. After that all seemed fine.So far the upgrade seems to be working fine with obvious changes to the icon, splash screen and new loader progress bar at the start.