upgrade to linux 2.6.3 causing strange behaviour

[Alan Chandler <alan@chandlerfamily.org.uk>]

I just installed the standard debian package kernel-image-2.6.3-1-k7 and 
booted from it, after previously running 2.6.1

For the first few minutes it seems to have real problems with cpu loading. 
Starting up KDE causes the soundserver to fail because of to high a CPU 
loading, but even after this has failed the mouse is very jittery.

I does eventually settle down, and now - some 5 mins after booting I seem to 
have a working system

Anyone else see this, and is it a feature of linux 2.6.3, or a debian problem?
-- 
Alan Chandler
alan@chandlerfamily.org.uk