I changed the units on the general tab to inches. When I go to set up the grid under snapping, whats the units. From what I have read it seems as though they are map units, it that correct? I am a attempting to get set up a sheet to fit within en existing title block.
For the snapping grid it is Millimeters no matter what as for most of other settings (line width, position and size of items etc - generally most of the settings in QGIS (1.8)). As far as I can see there is only option to change units to inches for page size.
(btw for map frame grid interval/offset - the units are used from project settings - in main QGIS window go to Settings/Project Properties... or depending on used projection)