Previously before the latest update, my n900 could not be detected by other devices via bluetooth if wifi is connected. After the update, it seems that this problem no longer exists. However, I noticed that the bluetooth transfer is slow if wifi is connected for now. Anyone has this problem?
This is a known problem: Wifi and Bluetooth share the same antenna, so if you enable both of them, they'll be both slower. However, you won't notice the slower Wifi, you will only notice the slower Bluetooth.
That also explains why you can't properly use any stereo Bluetooth headset for listening to music while connected to Wifi: audio will be choppy and lossy.
Feel free to vote for this bug (A2DP audio problems while connected to Wifi) in Bugzilla, if you want and if you have time:
