See also bug 142789 Description of problem: setitimer operates on individual threads, even under NPTL. POSIX says it should be process-wide. Version-Release number of selected component (if applicable): 2.6.9 Tracking bug for upstream work.
Created attachment 108491 [details] patch posted upstream
My changes are in Linus's tree now, hopefully in 2.6.12
Rawhide 2.6.12rcN kernels include this.
All good in FC4.