I capture 5-15 hours of 30f XH-A1 footage every1-2 weeks and have had 0 problems. The only issue I have had is that if you tape video over video and the time code drastically changes vegas will capture every frame as a file after the original piece. It gets annoying, but i just sort the files by time and delete the 1 sec vids. Enjoy.
If Zelkien69 has had no problem with 30f, have you ever done 24f in V8 and what were your results? I only get the individual clips for every frame, but I also only use fresh tapes, no duplicates. Thanks for any help.