Ok, here's the possible problem: Under Tiger, pressing '[' or ']' would resize a brush. The visible brush outline around the cursor would step through the different sizes whilst the key was held down. Under Leopard the same action does resize the brush, but the outline doesn't change until the '[' or ']' key is released. That is, PS it doesn't show the intermediate sizes whilst the key is depressed, only the final size on release. However, the diameter numbers in the options bar do change when the key is held down. I wonder if anyone else has noticed this? Thanks, Infra.