Psion Netbook Pro: Follow-Up

There are various annoying issues with my Netbook Pro:
- unresponsive spacebar
- weakened battery
- crackling while playing mp3s

I managed to fix the spacebar rather quickly by inserting a small piece of thick paper between the rubber dome and the keycap. The second issue is a bit more pressing but since the battery still holds about 3-4 hours (with Ethernet), I can live with that for a while. However, I will be rebuilding the battery, if I decide to keep the Netbook in the long-term. The crackling sound is the biggest problem so far. What happens is that, if you do anything (task switching, scrolling, etc.) during MP3 playback, you'll get lots of crackling noise (like static) in the background. If you leave the computer alone, sound remains clear. Supposedly, there is a bug in later firmwares (400 and newer) and we're currently trying to find the last pre-400 firmware to test this.