Here is discussion of this issue - http://forum.parallels.com/showthread.php?267551
Here is discussion of this issue - http://forum.parallels.com/showthread.php?267551
We are delaying it a little and would expect release in mid-Jun.
Plesk 11.5 has become available yesterday in "early adopter" phase. It will be announced widely today-tomorrow.
Failed to download the package http://autoinstall.plesk.com/PSA_11.5.30/plesk_getkeyinfo.sh:
The requested URL returned error: 404
Failed to check whether a new license key is available.
Probably you have chosen to see only "regular" or "late adopter" releases in your "Update and Upgrade Settings".
Another probable reason is that regional download cache didn't receive updates at the time you tried it yesterday. It must be already refreshed today. Let us know if it worked for you.
Regards