I'm still using 4.2.52(+4). Quanah still lists 4.2.52(+4) on his config website. I'm not sure if anybody else confesses to using Solaris...
4.3 seemed to go nowhere fast. 4.4 is still a bit new for my taste. It's not clear that there's any performance advantage, and there might even be a performance hit. Check the newsgroup. Do your own tests. (Insert all the other usual advice here.) If you're looking for sticking with the masses, I think we're still at 4.2. As for crashes: Make sure you're up to patch -- both OS and OpenLDAP. Make sure your builds have full debugging symbols -- this means your dep'd libraries too -- and start saving the core dumps. (On Solaris, this usually means coreadm(1M).) Once you've met those two conditions, send the results (from gdb) to the OpenLDAP ITS. If it *is* Sleepycat's fault, I'm fairly certain the response you get won't hold back. But there's a lot to a "db write", and you'd be amazed how a quickly a well prepared report might result in a commit to back-bdb...
