Hi -- haven't posted before, but thought I'd chime in on this one.
Started running the new B3 patch on the avx last night (via JVC 30K) & like most others had good success. Was able to change channels repeatedly between SHO, HBO, and HDNet, enter and exit the guide, disconnect / reconnect antenna input, disconnect / reconnect firewire, etc.. all with no lock-ups, pixelization, or drop-outs. Also turned everything on, off, and back on with no regard to sequence & even skipped the CH 2 to I2 channel down ritual on the 30K --- no apparent problems. Viewed channels for about 1 hour with no problems.
Decided to leave all equipment on overnight and during the day to check the long term stability. Left the channel set on HBO. This afternoon (about 20 hours later), checked on the picture. There had been about 25 resyncs over the 20 hour period tuned to HBO. Video and audio were present and in sync, but there was severe pixelization randomly across about 1/3 of the screen. This pixelization was continuous but picture was not overly choppy. Interestingly, I then changed channels to HDNet and then to SHO. All three channels had the same degree of continuous pixelization. Channel changes and video/audio sync still worked well with no freezes or dropouts, however -- my system had simply gone into a continuous pixelization mode on all HD channels, as if signal strength was lacking. I was confident that signal strength wasn't the issue since I always have strong signals and never see any pixelization from satellite. My first suspicion was the 30K because of it's general reputation for flakiness with regard to pixelization (a lucky guess), so I cycled the power on the 30K and everything came back to perfection --- no pixelization on any channel. It's been an hour and everything is still fine.
Thought I'd post this in case anyone else has a similar experience. I've used the AVX / 30K combo extensively over the last 8 months & have experienced all the typical AVX B2 problems, and the typical 30K tendency to pixelate under certain tape playback conditions -- but, overall the 30K has generally worked reliably and I've had a 70-80% success rate with recording HBO and SHO movies over 8 months. This strange, continuous pixelization mode was a unique experience since it involved live data and was not associated with lockups, loss of sync, or any one channel.