I'm not sure if this is a known issue or not. I haven't seen anyone else comment on it yet, so I'm going to mention it in case it's an actual problem to fix.
For the record I'm on 3.5 RC3 and this is a clean install (no previous version of AWS) of whatever version I downloaded yesterday.
If I go to a warning page (for example, click the Warn <Member> link in a post), then go to Who's Online, it shows this:
for my location.
All plugins from this hack are active and unmodified. None of the files (either from the hack or from vB itself) have been modified.