Still reading code

I'm working my way through the undergraduate's Perl code, annotating it with detailed comments to explain to myself what I think is going on.

I'm only about 30% through the code, but I think I've found a number of problems, one of them big.  Tomorrow morning I'll tie down the undergraduate and go over everything with him.  Or maybe tomorrow early afternoon - tomorrow morning I'm supposed to help one of the post-docs polish her talk for this weekend's Evo-WIBO meeting.