/dev/ttyS0 permissions changing...

[Hugo van der Merwe <hugovdm@mail.com>]

Hello,

Something on my machine is periodically changing /dev/ttyS0's
permissions to 640, whereas it needs to be 660 to use the modem... I
have now switched back to using ttyS1, but on laptops with only one
serial port this is not an option, so I'm still wondering what it is
that does this. I also want to know out of pure interest. Any ideas?

There's nothing obvious (at least to me at this point in time) in
cron.{d,daily,weekly,monthly}... I suppose I should try and find out 
exactly when this happens, but that will take a couple of days... as it
doesn't happen daily.

Thanks,
Hugo van der Merwe