hi
try recording with other vcr if u have spare one, pinnacle has an option i will have to install it to tell u what the option is, but there is an option saying something like “record with errors of donot skip on blanks” please try the go in preferences of the recording video
you may find it there, check for fungus on ur vcr of cassette if its a hardware issue it might be because of that.i thing the problem is not with the OS. also check is there any upgrade or new driver for pinnacle for this OS(Snow Leopard)
i would like to know whether this happens with this particular cassette or the problem is with other cassettes too.