Hi - I just got an A8-3850 AMD APU with integrated ATI HD 6550D video. Am running ATI catalyst 12.1 drivers and noticed that when I use DVRSMSToolbox (really todvrms.exe) to convert from MKV to WTV I get intermittent stuttering throughout while the audio works fine. I was curious whether this is somehow related to your post. I wasn't sure whther AMD's AVIVO was in any way related to todvrms.exe conversions? The source MKV plays fine without any stutter so it isn't a 29/59 frame rate bug issue. However after the MKV is run through todvrms.exe -wtv -v, the output stutters consistently is certain spots. Any insight you can provide would be appreciated. Thanks so much.