I'e just today completed a re-install of Vista Premium SP1 and can report that I am still having the two main issues of the screen going black when stopping a recording and the screensaver problem of the audio kicking in when having previously been on pause.
I'll uninstall (KB950126) and see what happens but I'm intrigued by the previous claim this update now supports UK PAL 50htz. I may give that a try first as I've been waiting for this al long time.
Vista Premium SP1 TV Pack 2008, Athlon 64x2 4200+AM2, 2GB DDR2 RAM, SATAII WDC WD25 7200rpm 250GB, MSI K9NGM2 MS-7252v1.1, SONY DW-Q78A DVD-RW Drive, Hauppauge NOVA-T 500 DVB-T 99101_LF_revD8B5 & Media Centre Remote Control