Cleaning up thumbnails

[Robert Moskowitz <rgm htt-consult com>]

I followed the advice at http://mtsmariner.com/content/view/47/66/

I have a script:

#!/bin/sh
find ~/.thumbnails -type f -atime +30 -exec rm {} \;

It does nothing.  I have over 10,000 files in ~/.thumbnails/normal

Can someone please help me?  I am running Centos 5.0 which has Gnome 2.16.0