The attached file test.pdf has two pages. But the command pdftoppm -jpeg test.pdf test will generate two same images, each image combines the two original pdf pages to one. Tested by using poppler-0.16.6 under MacOSX 10.6.7 x86_64
The size of pdf file exceeds 1MB and cannot be added as an attachment, I uploaded to http://dl.dropbox.com/u/1720917/test.pdf
I found the solution: ./pdftoppm -cropbox -jpeg test.pdf test
Not a bug then, just a special PDF that needs to use the cropbox to get the "pages"
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