DB error - invalid argument

please HELP!

my site is offline completely.

I get the error: Warning: Invalid argument supplied for foreach() in /home/gayeurope/domains/boysonline.eu/public_html/site/inc/classes/BxDolDb.php on line 389

What happened:

I upgraded from 7.0.2 to 7.0.3. no problems

I installed the new Visuland module and suddenly my top menu was messed up.

So i restored a backup of the database from the moment just before installing visuland.

now I get this warning which I cant get fixed!

all pages are working only the homepage isn't working anymore.

also my navigationmenu is messed up and not working anymore.

Anyone?????

pls help soon!

I uploaded a backup from the cachefolder..

my nav.menu and all my pages are working again

but I can't access my homepage.

I get several database error emails with lots and lots of codes.

can anyone help???

When you did a restore, did you remove the Visuland module also? May need to do this and try clearing the /cache (except for the .htaccess) and /cache_public directories.

I figured it out.

It was a chacheproblem AGAIN.

I never can completely clean my cachefolders like others tell me to do.

If I delete the sys_... files in the chachefolder my site becomes unstable and nonfunctional.

but it was not the Visuland module after all.

It was the 7.0.1 to 7.0.2 upgrade which caused the problem.

Everything is working now, except my newsmodule, but thats not a big issue