I have just upgraded to 7.180 yesterday and switched on Detection for Bittorrent and Yahoo Messenger.
Both were detected but the source IP for Yahoo Messenger was not correct (pointed to the Yahoo Messenger server instead).
The Bittorrent detection went well even though I was using Deluge and with full encryption and non standard listening ports enabled.
However I noted that CPU and Memory utilisation went up to 100% after a while and disabling my Bittorrent client stopped the problem.
If there is an interest in the log files, do let me know where to send them.