I have the same issue.

My site is http://www.tubeeireamnn.ie

Not only do the files get renamed to include a hyphen '-' instead of spaces in the file name but another extension is added in lower case i.e.

'video number one.avi' will result in 'video-number-one.AVI.avi'

At this stage the process que is still looking for the original file name but reports 'file not found'.

Is it possible to prevent people uploading files with spaces in the filename with an error message for them to correct, or would it be possible to amend the process que script to search the contents of the 'videos' folder as apposed to the predefined filename as recorded on upload.

This problem is only present when uploading through the user interface and ftp uploading and importing of videos works perfectly.

Hope the above is of some help

Thanks
Shane
TubeÉIREANN Support