Hello,
Interesting issue... I transferred to a new server using this method http://magento.stackexchange.com/questions/22120/how-to-move-magento-shop-to-another-server
All went fine except I noticed some image thumbnail weren't generating. So I did the standard stuff... Flushed the cache, re-index etc...
I've tried modifying the .htaccess file to adjust the cache limits etc...
I know the file exists in the proper location as well...
from my reading this might be a image resizing issue and a caching issue... I'm pretty lost at the moment as I have tried as many possibilities as I can find... I've ensured that GD is running on the server as well.. php.ini has sufficient memory allocated...
Any help would be greatly appreciated!
UPDATE - We actually determined this was an Image size issue.