7
Here's an addendum to the above issue. After changing
http://yoursite.comto
http://www.yoursite.com in mainfile.php major errors occurred in the module Article Manager for XOOPS when adding new content. Debugging allowed me to trace it back to mainfile.php. Undoing those changes returned everything back to normal.
Something else that raschmidt mentioned about double login makes me think he's on the right track. Before logging in at my main page -- which isn't open to the public yet -- Who's Online always shows that there's one member and one guest when in fact there's only one person, me. Once I try logging in security spits me back out as outlined above in the initial post, proclaiming that I do not have permission. Security seems to be assuming it's the guest version of me rather than a member version of me that is trying to access deeper into the site.
I lack the knowledge and insight to know whether this is a bug or normal or just a quirk of my system. I have no idea whether this is related to the mainfile.php problem as discussed but would definitely appreciate some insight.