Over the last month or so my PB (see sig) has really slowed down. Nothing has changed, still got at least 20% hard disk space free and I've done repair permissions on both the internal and external drive. It can take 5-10 secs to open an application right after a reboot. The app just bounces up and down in Dock. Sometimes it just locks up completely for 30 secs or so. Its old and I intend to replace it next year but I want to get productive use out of it for the time being. Should I do stuff liek clearing the PRAM or something similar?