If eclipse-sdk-3.4-r2 is installed with swt-3.4_pre6-r1, Eclipse will not start complaining of not being able to create a configuration file. The symptom of this was reported in bug 236407, but not the cause which I have discovered after much messing around. Reproducible: Always Steps to Reproduce: 1.emerge dev-util/eclipse-sdk-3.4-r2 2.(with dev-java/swt-3.4_pre6-r1 installed) 3. Actual Results: The package merges fine, but eclipse-sdk fails after the splash screen complaining of not being able to create a configuration file. Expected Results: Eclipse-sdk starts and runs as intended. If the dependency on dev-java/swt is further refined to exclude dev-java/swt-3.4_pre6-r1 and the require 3.4 and above, this could save someone else a lot of messing around.
Fixed by removing old swt ebuilds.