I am using Windows 8 and PS CC2014 and the issue is that I can't assign custom shortcut to the dot. I have been using , and . as decreasing and increasing brush size and it has worked well in every photoshop, even cc2014 in win7 but not in win8 it seems. It lets me to change the , and just tells me that it is in use in somewhere else but i can still change it. But I can't do the same with . as it complains it being used by an application although I have cleared that from the original place and left it empty, photoshop still recognizes it if I press it although it would be empty but I can't assign that key to anything else either.
Small thing but drives me crazy as I had to assign it to another keys and I am using the shortcuts from muscle memory mostly and end up changing the brush when I had an intention to increase the size. I tried to google this but couldn't find anything similar solution.