Usually this issue Depend from a Unusual Keyboard Layout…
To Fix it:
-
Follow:
Edit > Keyboard Shortcuts > Tools.
-
Set a new Keystroke for Bracket
How to Save Image as ICO on Photoshop CS for Mac and Windows:
How to Save As ICO on Photoshop
Photoshop Bracket Do Not Change Brush Size CS4/CS5/CS6
October 3, 2011 | By Duchateaux.