this may sound totaly pointless, but because i didnt know it caused me problems, was at somepoint i push caps lock key not realising and all my brush sizes turn to the precise point and i could work out how to get it back to normal untill i pressed every key on the keyboard finding it to have been caps lock key hehehehe but it did cause me problems not knowing this i put this in the wrong box sorry

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http://photoshopcontest.com/boards/viewtopic.php?p=69229#69229

i know what you mean... firt time it happened to me i was very very close to throwing my computer out the window and going to live in a convent
these things can be really annoying....