Have you tried rebuilding your desktop?
Also, I read in a thread that in some OS's other than OSX, a very, very long filename would result in the filename getting automatically truncated which would eliminate the file's extension, making the Finder unable to recognize what type of file it is, thus making it appear as a blank document.
Try shortening the name (if it is really really long).

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iMac G4 OSX 10.3.9
RAM 256MB
LW 4.10.5 Basic
ADSL anything from 3 to 8Mbps/around 1024kbps

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