I updated to 1.5.1 and the warning apear. But it works fine. the same with the version before, I guess 1.4.9. It displays the warning but works fine. I've checked everything, the php.ini the folder , the permissions, change the folder in different locations, full path and so on. but the path and folder taken from php.ini exist, and there are session files in it. So i thought it seems to be ok. just a little bug or something.
But after updating to 1.5.1 and runnig and collecting for some day's it say it had been stoped in fact of that error. I've tried to deactivate every plugin.
It's just a day of missing data but i don't wanna check the system every day
have anyone a clue to fix it?
I tried this forum and the wiki.
THX
WassUp 1.5.1 (1.4.9)
WP 2.5
PHP5
on a root server