Okay, i can now report that this addon causes my photoplog installation to be inaccessible to IE users when wowhead bbcode is enabled. I disable the bbcode product and IE users are able to access the photoplog installation again. (I did a report to photoplog here:
http://www.photoplog.com/forum/showthread.php?t=2140)
As you can see from the link, I found a bug in IE7 that causes this:
http://support.microsoft.com/kb/927917/en-us
I don't know how many of my users use IE yet, we're still testing, but this is a fairly major down. I can't afford photopost atm.