i've tried the various short cut commands and i cant take a screenshot. i will hear the camera snap. but the error shows " screen capture fail.. bla bla the error is 'unable to create type string' ... " i've googled this problem but there was no solution said. i've done the disk utility repair, set keyboard short cuts to default. i dont intend to install a 3rd party app. i just want to fix this problem anyone know what i could do? thank you i updated to 10.5.7 on unibody if that might help.