I'm also having issues with the memory leak. I've updated to Procaster Beta (the most recent release). I'm trying to stream a video online, and it causes my computer to lag, and be used at 100% CPU.
HP G60 Notebook with Windows 7 SP1
Pentium Dual-Core T4400 firstname.lastname@example.orgGHz
4.0 GB RAM
Any ideas? I have a big stream coming up tomorrow, and I'm afraid if I don't get this resolved soon, I won't be able to stream.