Normally PXE working fine. After some time (e.g. 3 hours), it takes up all available CPU. Turned debugging on and it seems to be stuck in an infinite loop [ see select() statement in pxeservice.cc , line 260 ]
This should be fixed in pxe-0.1-20, which will show up in rawhide soon. *** This bug has been marked as a duplicate of 10862 ***