Had an interesting bug report about the builtin math functions in the bash shell. If you feed it some bogus data as part of an arithmetic operation, all subsequent arithmetic ops will fail. I've spent a good bit of time tracking this one down. I've made some progress but not as much as I would like. Sounds like my afternoon will be fun.
Now that T2 is out I need to update my home box... sounds like a project for Saturday, wife and kids will be out of the house. I will have my trusty helper Murphy (the dog) he's always good for a few suggestions.