Hi. I'm a fairly new user of Macs and OSX. I'm running a PowerMac G4 AGP Graphics with 10.4.8 and it's been trouble free since I bought it last October. Yesterday when I attempted to play a DVD, DVD Player complained about an "Initialization Error error: nilP" Thinking that perhaps some settings had gotten messed up somehow, I dragged that Settings folder from ~/Library/Application Support/DVD Player to the trash, but that was unsuccessful. I shut down and restarted the machine which didn't help either. In fact my problems compounded because when I wanted to go online to research this problem on Google, Safari would start but not display a window. I could only access its menu bar and clicking File-New Window would not bring up a window either. Then I noticed that Mail.app had some strangeness. The main mailboxes (Inbox, Drafts, Sent, Trash) were now named INBOX_SPECIAL_MAILBOX_NAME, etc and instead of RE: in replies in the message list I now have REPLY_SUBJECT_PREFIX. Otherwise mail is working fine, and Firefox is working in place of Safari. I'm in the process of downloading VLC, which I expect would work fine in place of DVD Player. I recently removed the original DVD-ROM drive and installed a Pioneer DVR-111D burner. I installed MacTheRipper, DVD2One and Burn to do some ripping and burning. DVD Player was working for a couple of days after all that, though. In my research on Google, I came across few examples of the DVD player problem and what I did find seemed to indicate that Shapeshifter can be a cause of some of these problems. I hadn't used it in a while anyway, so I deleted what I could find of it. That didn't seem to help me, though. I also ran the 'Fix Permissions' in Disk Utility. No joy. I'm hoping some of you helpful people can point me in the right direction. I have 10 years of experience with Linux (just home desktop use, though) before this so I don't mind digging into config files. By the way, this machine didn't come with the 10.4 disks but I'm thinking this is a good time to get them. Thanks in advance for your help! ============================== David Candler dcandler at sasktel.net Chaplin, Saskatchewan Canada ==============================