In the bbcode list where it describes the [img] tag, there is an error in the file path. Example: vbadvanced bbcode link
I am not 100% sure the problem is related to vbag, but the odds point in that direction. I see the problem on every site I visit that uses the gallery. I don't think I have seen the problem on sites without it. Actually, I am also seeing the problem on sites that use the cmps but not the gallery.
A user pointed this out to me while reading the faq on how to post images.