Creates the same image over and over again when not using clean urls.

There was already a discussion if you really need clean urls with imagecache. Because i had trouble with my server i used the work around. But than i found out that there are thousands of files in the imagecache folder.
Every time you hit www.example.com/?q=files/imagecache/[preset]/[urltofile.jpg] it creates a new file with file_1.jpg, file_2.jpg, file3_jpg.
This is an easy way to create a lot of files at somebody else's website. Sooner or later the webspace will be flooded with the same file.