Can't install a single plugin on Eclipse 3.5

Question

I'm trying to install the Subversion team provider on Eclipse 3.5, and it fails with the following message:

An error occurred while collecting items to be installed
session context was:(profile=SDKProfile,phase=org.eclipse.equinox.internal.provisional.p2.engine.phases.Collect, operand=, action=).
 Result of processing steps.
Unpack facility not configured
OK
OK
Result of processing steps.
Unpack facility not configured
OK
OK

Not just SVN, try installing any plugin, and it fails to install. Isn't this a serious bug? Has anyone else seen it or is there a workaround? Changing to a brand new workspace doesn't help either.

Answer 1

What version of Java are you running with? Java 5+ may be required. See this email

Answer 2

I installed Java SDK from Sun and then started with the -vm option. It seems that Eclipse used my GNU version of Java without the -vm option.

./eclipse -vm /usr/java/jdk1.5.0_22/jre/bin/