Eclipse updates worked fine for me on FC4, now I am having all kinds of trouble with them. No matter what I do I cannot get Web Tools to install. http://download.eclipse.org/webtools/updates/ I get various errors, Null pointer, cast exceptions, internal errors, etc... This is from a clean FC5 install. No .eclipse or workspace from FC4.
Here's the cast error: org.eclipse.update.internal.core.SiteFilePackedPluginContentConsumer cannot be cast to org.eclipse.update.internal.core.SiteFilePluginContentConsumer I am slowly getting things installed by restarting Eclipse after each update. Doing everything in a group fails.
We fixed a bunch of issues with the way the update manager works with FC-6, have you tried the packages from FC-6 yet?