I have a very strange problem with my N900. I use it a LOT with fbreader to read ebooks and I have it set up to scroll one page on a finger tap. Now there is one spot on the screen where my finger falls naturally and I think about 90% of all my taps fall in that area. Recently I noticed some finger taps in that area do not register anymore.

Here's where it gets interesting. First, finger tapping anywhere else on the screen works on the first try. Second, once the problem occurs, repeated finger taps in that spot do not register. However tapping anywhere else on the screen works, and tapping again in the problem area also registers. Third, stylus tapping the problem area works every time.

So I tested the screen with the sketch app. I could draw continuous lines, interrupted lines, dots, circles both with my finger and the stylus anywhere on the screen, and every single input registered including the problem area.

Now if other apps had a problem, or the stylus did not register, I may think the resistive layer is developing a problem. But it's limited to fbreader, and only developed fairly recently.

Any ideas? My N900 is running kernel-power47 overclocked to 750Mhz, the latest CSSU, and many apps from extras-devel. Under these circumstances, I would understand some crashes, but the N900 is rock solid with great performance and battery life, except for the wonky finger tap input in fbreader...