VideoStudio :: 3 Frame Pause At Beginning Of Every Clip

I get this strange thing when editing clips in VS x3 - each clip has 3 frames the same at the beginning. It's a real pain, as it mean I have to cut each clip at the start. I always assumed it was something to do with the footage from my Canon HG20 camcorder. It's a HDD camcorder, and though I don't shoot in HD (I shoot in SP - 7 sbps), I never used to get the problem when editing mini DV clips. I recently downloaded the Pinnacle Studio 15 trial, however, and noticed that it didn't happen in that editor. I prefer VS X3, and also like the trial of VSX4, though the problem persists in that version, as well.