After installing Active Users 4.017 mod, I noticed that when I do "View source" on the web page of the forum, I see on the top before anything else the following:
Everything works fine though, but this doesn't seem to be right. I followed the instructions to the letter and the mod works fine. So I am not sure what to check for this.
That is natural, as those includes are not used. The # has been removed from the code, and those lines are then printed as comments. If you don't want it to show those lines in the html-code, open LangMODS_Ls3kAU4.asp and remove the lines that you don't use.