After I've chosen files to be uploaded (or donated if you will) with UploadWizard I can click on any file to choose a different file. This is something I haven't seen before and feels not intuitive.
- What I would expect after clicking on a name would be to change the name of the file being uploaded.
- What I would expect after clicking on a thumbnail (which is not a thumbnail BTW and feels wrong too) would be to see the picture being uploaded (it works as expected later on).
- Remove shouldn't simply remove the file.
Note that I don't want push "upload" until the names are OK. If it is problematic then you should add a note that files are not uploaded yet and I can change their names later.
Also if you cannot display thumbnails I think you should show blank thumbnails but rather only show names of files.