Backing up causing 404 Error

I know this is a vague question, but what would cause a 404 Error when I back up from my Private Message page to my Private Message Inbox?? :confused:

I am going from this URL…


back to this one…


…and I get a 404 error.

What is even more strange, is that if I copy and paste this into the Address Bar and hit go…


…my custom error-handler throws a 404 error, even though the Private Message loads normally in the browser?! :-/

What is going on here??



I’m still having trouble with this issue.

Tonight while trouble-shooting, it seems that the 404-Error is occurring when the Private Message page is being loaded (versus backing up to it).

Here would be an example of the URL to a PM…


I don’t understand how Apache can throw a 404-Error while at the same time properly loading the Private Message page?! :-/

This is a really frustrating issue…