I regularly call getDirectoryContents on a certain directory looking for changes, when I 'lsof' my process (list open files) it has an absurd number of open descriptors to said directory open. I didn't see an obvious bug in getDirectoryContents, does anyone know what is going on?

Hmm. It looks fine to me: I just tried a test doing getDirectoryContents repeatedly on the same directory and it re-uses the same descriptor each time. An strace might be useful...

Also, did the fixes for sockets not getting properly closed all the time make it into 6.00? I am trying to track down some out of descriptor problems.

Yes, all the fixes to Network are in 6.0. Cheers, Simon