Works with the same ebuild as 0.2.4, just a simple mv and you're done. I can't say anything except that it compiles, though, because I haven't restarted X yet. The author reports that it contains fixes. Reproducible: Always Steps to Reproduce:
uim-0.2.5 won't start; (as you might notice) the upstream released uim-0.2.5.1 (uim-xim was still broken) and uim-0.2.5.2 (both uim and uim-xim work fine). I'll wait for a while to see if there are no other broken things and commit 0.2.5.2 tonight.
In CVS. Thanks for reporting.