Catalog cover/book cover, incorrect display
The "catalog cover" does NOT display correctly in the Kindle viewer. It falls out of the right-hand frame, with a lot of extra white space on the left. This would not be acceptable for sales purposes. This cover appears if you backspace from the internal cover, which appears when the book is opened.
The "internal cover" appears correctly in the Kindle viewer. This is formed by the first html page in the book.
Please advise if the book cover I am seeing is NOT the catalog cover? If so it would only be seen by pressing the "cover" button or by paging back. But still ugly.
Production method: Internal cover is an html page. Catalog cover is a jpg file, 800 pixels wide by 600 pixels tall. It is specified in the Calibre dialog by selecting the file.
Calibre generates the epub. I get the same problem if I generate the mobi in Calibre or by using Kindlegen. As a sanity check, I viewed the epub in Adobe Digital Editions, and the full cover appears, centered.
Environment: Win XP sp3.