Malloc problem

Hi,
I've got a serious problem with malloc. I tried MALLOC = malloc and
MALLOC = malloc-930716 but the rusult was the same: every application
crash down because it can' t free the memory.
I'm using the latest uclibc (0.9.15) with the 2.4.18 kernel. The
processor is an ARM 720T running at 73 Mhz.
What I have to do?

Thanks, Roberto.