Since i updated to PR1.3.1 (no cssu installed) my gps takes ages to locate my position about 40-60 secs when previously it took 10-15 secs to do so and i have had at least 3-4 hildon desktop crashes within the last 2 weeks (never had 1 crash since i got the phone 2 years ago) when it eventually loads back up i have desktop icons missing and i have to edit my home screen to sort it.

And they say that this was only an internet security update...hmmmmmmmm