I've seen a few random errors once in a while in my webpages as well.
It was with debian on a celeron 500Mhz about 4 months ago (sorry i forget the version of xampp). and more recently on a Pentium 4 CPU 3.00GHz running fedora core 3 with xampp-linux-1.4.12.
hope that helps and i also hope this gets resolved sometime
and thanks for the xampp package.
edit: from what ive seen, the errors are few and far between.