I don't seem to have any problem deleting messages either from the "inbox" or from archived PMs, using the procedure described.

A remotely possible cause for not seeing the effects of processing is that your browser is not set to refresh the page, so it continues to show you the first version (from Temp memory on your computer) on your machine, even if the page changes while you're still at that page.

If this is the cause, going to somewhere else and then coming back to your personal page might show a change; but the easier check is just clicking the "Refresh" button in most browsers to force an update. (F5 works as a "refresh page" button in most Windows programs, if you have a hard time spotting the button on your browser toolbars.)

I haven't heard of anyone having this problem for a couple of years; but it's easy to check, and caused a problem or two for some people in previous historical times.

In the unlikely event that a refresh shows the PMs you checked and processed were deleted and your browser just didn't tell you: in IE, Tools|Internet Options, General Tab, Browsing History, Settings Button will show a place to check "check for new page versions" or something like that. Other browsers should have a similar setting "somewhere," since it's needed to tell the browser how to handle pages you might want to look at offline as well as for how to update pages you're connected to.

John