We're using advanced forum 7.x-2.4 and we came across the following strange problem:
When looking at a topic with more than one page of comments it is impossible to look at the comments of the pages before the last one. When trying the page will either be completely blank (page only loads:

) or have no css (whole head tag is stripped empty).
When disabling the module everything works and all topic pages can be viewed again.

We are using (among others):

  • Advanced forum
  • Forum access
  • ACL

But these don't seem to be the error. The log doesn't show an error either.

Anyone having the same issue? Or know a fix?