Please do not post "any old error" you might be having in here. This area is for BUGS, not just any old thing that doesnt work.
Bugs can generally be duplicated -- that means that if I install the same version you are using on my server -- I will get the same error.
MySQL errors, for example, are not always bugs, in fact most of the errors we see on this forum related to MySQL are problems with MySQL, not b2evolution.
Try reproducing your bug at the demo site: http://demo.b2evolution.net - be sure to use the same version and MySQL/PHP major version ("Demo variants").
now read this: [url=http://forums.b2evolution.net/viewtopic.php?t=1584]How to report bugs effectively[/url]
thanks :)