Same problem here. Actually, status is changed, but with a delay (about 5 minutes).
Also, following bugs happened:
WLM simply doesn't start (and many msnmsgr.exe appear in Task Manager process list);
WLM starts without my command (no option to (re)start automatically is checked).
I've already uninstalled, did a registry cleanup (by using CCleaner), reinstalled and it is still not working well.
Before installing 5.10 version, I was using 4.85 version and everything was just working fine.
Where can I get 4.85 version installer?
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Updating:
Everytime I try to change my status, a msgmsgr.exe process appears: