Indeed. His problems sound memory related. A double free, leak or a dereference of an invalid pointer. Tools like ValGrind, dmalloc, ElectricFence and the like will probably help.
If the problem is memory leaks and the like you could link the daemon with a specialised memory management library that mungs memory that is allocated (i.e. puts in pointer values outside the current process memory location so that if they are dereferenced they will cause a segmentation violation) and puts walls around memory allocations so that if you overwrite a memory allocation it is detected when you free the memory. I have found such tools very useful for tracking memory overwrite problems.
Regards -- Oliver Jones » Director » oliver(a)deeperdesign.com » +64 (21) 41 2238 Deeper Design Limited » +64 (7) 377 3328 » www.deeperdesign.com