Hiya
I installed the 4.1.9 version & I'm running vbulletin 4.1.10 ... everything seems to be working ok except for one tiny little problem.
I have this funny looking white border on my blog & I can't seem to get rid of it, initially there was a big section of white in the main posting area but I changed the backgroung colour & it filled in some of the whits space but not all of it.
I included a couple of images to give you an idea of what I'm talking about.