For some reason, I have had far more problems (even some problems from 8105) after I upgraded my o2 locked Streak to 1.5.0 from 1.4.6. I never had any problems with orientation, and the WiFi has become even more erratic than it was on 8105. WiFi tethering doesn't work either now, whereas it did in 1.4.6, and I've had a few more crashes and once or twice it has failed to resume from sleep (i.e. only way to wake it is to take out the battery).
If I were to flash 1.4.6 over 1.5.0, then would I need to wipe the phone? If I do, then I might just hold out and see if all my problems are re-fixed in a later DJSteve build.