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I have uploaded the image using "postreply" feature only and the image is having less then the mentioned size.
What browser are you using?(I'm using Firefox, and it perfect). Could you use another one to test it? Is your pic under the size of 1024X768 pixels?
I am not 100% sure but parameters will be separated with a semicolon and not with a &. This parameters will usually not added to an URL as query.