I have 2 Macs running CS. The laptop which is running 10.4.7 has suddenly developed this problem. I can create a new document or load an existing doc, work on it etc, but if I add any amount of text and go to save it I get firstly : 'an unknown error has occured', once I click 'OK' then I get 'Can't save preview, but all other information was saved. The file couldn't be found ID= -43'. Needless to say nothing gets saved. I had noticed that in the character palatte, while I could choose a font from the drop down menu, no chosen font name showed up in the box - that was the first indication that something was wrong. I've run fontdoctor on the fonts with no issues being reported. I've tried trashing the prefs, caches, reinstalling CS - nothing helps. I ruled out user issues by launching a second user and trying it in there - same problem. I really need to use CS on the laptop. Any help would be really appreciated.