I've updated the GriefPrevention plugin to version 14.0.1. This should fix the bug that was being caused by duplicate events firing (for main / offhand). So subclaims and admin claims work again.
The claim tool has also been changed from golden baagels back to golden shovels. golden shovels won't create path blocks so are usable now.
Also, you can now connect directly to the creative server by connecting to creativemc.starcatcher.us instead of mc.starcatcher.us
I updated the creative server's settings. You can't build anything unless you claim it first now. You can claim stuff with a golden shovel. Once unclaimed, it says stuff will automatically disappear after a few minutes (not sure how this feature works yet). TNT / entity spam won't work anymore, which is awesome. I do have suspects for the tnt / sponge griefing done around this one tower, but I probably won't do anything since it was done a while ago.
I also tried doing a little cleanup, but it isn't much better ...
Just a note for the few people who used it, the creative server will be down until Monday. The survival server is on a dedicated server though so will always be up.