Problem with formatting on test site

I have always used a test install and test verious hacks for vBulletin. I used a current backup of my live vBulletin database, mysql it to a seperate database for testing purposes, then I can freely install and configure plugins before I go live with them on my live forum.

I'm not sure when this problem occured, but I am currently running vBSEO 3.0.0 RC6. When I upload and install the backup database from my live fourms to the test forum, I always disable VBSEO, as well as VBSEO google sitemap. The problem I have is, when I go to the beta forum mainpage, I lose all background formating for the site. I get a blank white background, all the text appears, as it should, I just lose all formating.

Is this a problem with vBSEO or am I doing something else wrong?

Thanks in advance for your help!

I fixed the problem by creating a new default style. I then switched to the new style, then went back to my orginial style and the formatting corrected itself.

Thanks