Problem uploading .jar files using Upload class

[eluser]Daniel H[/eluser]
Ah I have now discovered the issue: the octet mime is actually used for various other file types, such as images etc. So when the upload class tries to process the jar file it thinks it is an image, so tries to validate it using getimagesize, which will of course fail for a jar file.

Does anyone have any suggestions as to how I can amend the Upload class to allow octet stream to be used across file types?