Exposé error... some wierd bug... someone please help

I have a slight problem with my Ibook G4. Firstly the trackpad works most of the time but sometimes it just decides to give up on me.
Secondly and more importantly, sometimes while innocently working on my ibook, the exposé feature goes a bit crazy. Just randomly starts switching windows or exposing windows or spreading them apart. And if i have any text editor open or if a text feild is active before this wierd bug starts to manifest itself, then, everytime the exposé automatically and randomly activates the message 9ol.\ keeps getting typed in the text feild.
I have no control over this, and i just have to sort of wait for a while before everything comes back to normal.
I tried switching off the trackpad and using a normal mouse. Same error. I removed the exposé mouse corners, so that its only accessible thru the F-keys. Same error keeps coming. I even tried to turn the function in the keyboard settings which states i will need to press the fn key before being able to use the F keys for software functions. I still get the error.
I have no idea wht it is. Is it a virus? Is it some sort of bug in the O/S? Is it a hardware problem? Perhaps a loose connection somehwere. In the keyboard maybe.
This breed of lap top is sooo fragile. Little things upset it. I just bought it a year ago and been taking meticulous care of it. Yet its been giving me problems after problems. I guess its nothing compared to its big brothers in the power breeds.
Anyway, anyone with any idea what this problem could be and what course of action i could take to correct it, please let me know. Thanks.

Hi Karan,
Welcome to Apple Discussions
You might want to try starting up in Safe Mode and see if you have the same problem (More information in Knowledge Base Document #107393 on How to Startup In Safe Mode). You might want to try performing an Archive and Install (Knowledge Base Document #107120).
I hope that helps,
Jon

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