My board runs userland apps that makes use of SIGUSR1. When I did a cvs update today and recompiled the kernel, when I run my app it quits with "User defined signal 1" and bails. The signal is delivered a pthread_kill command. The app runs about 8 or 9 threads all blocking on various IO with various priority levels. I boot the old kernel back up and it runs fine. Board is running an NECVR4181 Toolchain is a uclibc something.19 (building 20 now) with gcc 3.3 and the latest binutils I have the 2.4.21 kernel and I did a cvs update on it today. If anyone has any ideas I'd appreciate knowing. Thanks! Steve