Thanks for letting us know! That's useful if we encounter this one in future, definitely! Regarding the no_ink.inf file, you may as well leave it there, and it'll avoid any problems if something changes in Microsoft's Ink Services settings further on down the line.
With thread subscription, I seem to be getting replies without problems here when I subscribe, so it might be worthwhile checking your junkmail folder just in case ( I've seen forum replies get trashed / blocked from users before from time to time ), seeing if you get any emails sent out from other threads you subscribe to, and trying another email address in your user control panel. I hope that's of some help, anyway!