I just got the clicking too, right on the n900 text where the close button is.

I was thinking oh noooo, I've broked it!!!

Here's a solution to those without a magazine handy...spit on your screen then wipe it in firmly with a soft cloth (I used my t-shirt), slightly squeezing the screen, I got a very loud click and then no more clicks at all...brilliant.

Maybe it's just me but when using a screen protector do you find you get an accumulation of gunk around the edge of the protector/screen?

Maybe this is whats causing it, or at least a contributing factor.

just my 2p