Any tape head can become misaligned so that if the tape is played back on a different cam you will see these problems. That said I used to see this problem between Canon and other brands more often. But this was when I played them for capture into a NLE. I had heard that Canon had a slightly different firewire standard. But the Canon cams were also prone to misalignment.
MacPro4,1 2.66GHz 8 core 12gigs of ram. GPU: Nvidia Geoforce GT120 with Vram 512. OS X 10.6.x; Camcorders: Panasonic AG-HPX170, Sony Z7U, Canon HV30/40, Sony vx2000/PD170; FCP 6 certified; write professionally for a variety of media; teach video production in L.A.