Ben writes:
I created a few new aliases (what is the purpose of this? Not sure...). Now, all 3 of "us" appear to be online in the "online" box at the top of the page.
A common request is, "I registered as name X, but can you change my name to Y." The message database records messages with the author's user name, so a name can never go away, else the message will have to be listed as being from an unregistered user. By putting the feature on the user profile page it offloads this function from the moderators.
The "other" me's are slowly disappearing from the "online" page. So, this is weird when creating new aliases (or I assume changing aliases), but not in general.
I hadn't anticipated this, but the session time is currently set to 30 minutes, so for 30 minutes after you define a new alias, the old alias will still appear in the list. It's easy to fix and I've added this to the bug list, but there are other things with higher priority right now, like the page links and signature issues.
--Percy