Can't open signed PDFs in acroread with AFS homedir

[jdreed]

Using acroread, one cannot open a signed PDF (such as those given out but the registrar) on Athena, if you have an AFS homedir. Works fine on local disk. A preliminary strace shows it attempting to talk to something on fd 3 and getting EAGAIN constantly until it gives up and briefly displays a "You're not connected to the network" dialog and quits.