Hi Guys, I've had a search around and cannot find this specific issue anywhere. I didn't install the 10.5.3 update as I just didn't get round to it, Software Update prompted me last night for the new iTunes, QuickTime and the 10.5.4 combined update. Download took ages but once it rebooted to do the install the installer seemed to be stuck only a few millimetres into the progress bar. I went to bed expecting it to have finished by morning but it hasn't moved at all! That's 8 hours! I turned it off and tried again but same result so far...... I'm going to boot, repair permissions and try again...... and then if that doesn't work try and find the 10.5.3 updater and run that first. Anyone else had this or can offer some advice? This is on my iMac (the iBook updated perfectly!).