The serious bluetooth problems (disconnects and not notifying the handsfree for the call) are solved. I noticed some others:
1) When a call comes with the caller id hidden, sometimes the phones starts first vibrating and with no indication at the handsfree. When the hands free shows the incoming call, the ringtone starts playing.
2) In any case (with or without the caller id hidden) the hands free does not play it's internal ring tone, nor the phones ring tone. Before the fixes, it played it's internal ringtone and sometimes the phones ring tone. At my other phones and at the Sensation with the Team Venom ViperS 5.1.0 works perfectly.
3) The hands free has a little lcd screen that shows the caller id. If the caller's phone number is on my phonebook, it should display the name instead of the number. With that rom, it only shows the number. With any Sense rom and any other mobile phone, it shows the name...