The space bar part is really strange. But then I never had a tape-drive, I only used my floppy.
Have you tried cleaning the tape drive? I'd imagine like an audio tape player, it can get quite dusty in there. I'd try blowing it out, and taking a q-tip lightly-dipped in alcohol to the dirtier parts. I'd also try blowing on the tape itself where the film is. Sometimes dust gets stuck in there too.