I'm using Photoshop CS5 on a MacBook Air running OS X 10.8.2
I have managed to change the brush in my quick selection tool, or at least the way it looks on the screen, and I can't figure out how to get it back.
It now looks like a paint brush with light rays around it instead of the circle with the plus sign in the middle. It does not change size when the ] key is hit.
The current preset says its Quick Selection Tool Hard Round 250 1
In addition when I use the marquee tool I can not see the crosshairs when I am inside the image.
I know I messed it up :} but I don't know how and I've searched the forum and the web and I can't find a hit telling me how to set it back.
The only thing I have knowingly done is to create a preset for a dashed line and imagine in doing that I have messed up the other. I have also changed the preferences for the cursor back and forth between standard and precise but it doesn't seem to make any difference.
You could try resetting the Tools individually or trashing prefs by keeping command-alt-shift/ctrl-alt-shift pressed while starting Photoshop after making sure all customized presets like Actions, Patterns, Brushes etc. have been saved and making a note of the Preferences you’ve changed.