At least that's what Erik reports (it's not reported on Jakarta's site). [Download · Release Notes] I especially like the part about it being significantly faster than 4.1.18. I'll have to upgrade in the near future.
I'm using DBUnit on all many of my personal projects (appfuse, struts-resume, security-example, day job) right now and I really dig it. It makes things so much easier. Mainly I've been using it to populate a database with default data, and haven't made my JUnit tests depend on cleaning/inserting. Today I've decided to tackle this issue (clean, insert, run test) - so I trotted on over to dbunit.org and discovered a new version (1.5) was released at the beginning of this month. I'm hoping (haven't tried yet) that I can do an export and CLEAN_INSERT and my task will be finished.
BTW, I dislike the case of the name "Dbunit" and I prefer "DBUnit," so that's what I'll be typing it as - hope you don't mind.