I've been trying to delete a usergroup with ~50-100 members and every time I try, I get the following error message: There is nothing in the XF server error logs. I could try increasing the max memory size but it seems that this is a bug/memory leak in xenforo considering the excessive memory usage (over 128MB). Any ideas on how to fix this? edit: Just found this post http://xenforo.com/community/threads/fatal-error-allowed-memory-size.5627/#post-85268 I disabled debug mode which resulted changed the issue to a timeout by the web server. However when I went back to the usergroup page, it seems it was deleted. Do I have to worry about any traces left due to the timeout?