I found that when updating to version 1.4.12 (at least for the zip version) updates aren't done to files php.ini. So eaccelerator is useless. I had to make a full installation from the begining and had to compage my config files and get mysql back etc etc. It took me 6 hours, but now, no more bugs and eaccelerator works. That makes my website at least 2x faster. Unfortunately, I lost a lot of guests during the time I had to put the website down for maintenance... but that's the price for making the website faster.
Please check out to make the patching from 1.4.11 to 1.4.12 working for eaccelerator!!
Thx a lot