I've had my TX2 for over a year now, and I've gone through about three or four styli (for various reasons, not all of them my fault =P) so far.  Something I've noticed with each of them is that, every few weeks or months, it will detect a different amount of pressure than what is actually being applied.  Sometimes it'll detect a lot more, other times, a lot less.  It seems to go back and forth, every few weeks or so. And it's happened with every stylus I've used so far, so it wasn't just a bug with one of them.

I don't think its the pressure sensor breaking, since the behavior goes back and forth from time to time.

Has anyone else noticed this, or had this issue? It's happened on Windows Vista and Windows 7, and with at least two or three versions of the n-trig driver.

I wish n-trig had a utility to adjust how it interprets the amount of pressure being applied; at least then I could compensate for this.

I should also note that the shifts are rather sudden. This morning, it was behaving more or less normally, and when I booted up my machine this evening, the stylus was suddenly way too sensitive. This sort of suddenness--the change happening between boots--seems to have been the case every time a shift occurs, with each of the styli I've used.