How did you convert it? I tried doing that and it isn't perfect. Can you provide a link to the mobi? Thanks.

You are free to convert any text to the closed eBook reading format. It'd be great if the eBook just was able to show open formats in a correct way (my Hanlin v3 is capable of that) -- it also can run OpenInkpot, a Linux for eBook readers.

How is mobi more closed than pdf? It seems to be well documented: http://wiki.mobileread.com/wiki/MOBI

PDF is an ISO standard. The issue is more the DRM restrictions on the Kindle than it is the MOBI format itself.

The kindle doesn't have any DRM restrictions. Those are on the books Amazon sells. Files you obtain otherwise and put on the Kindle don't magically get DRM'd.

That's true (I'm actually working on an ebook generation library that does PDF, ePUB, and MOBI), but most books that most people will read on the Kindle do have that DRM. That's what I meant by DRM restrictions on the Kindle.

If it sounded like I was saying that the device itself forces DRM, that's not what I meant.

I wouldn't exactly call mobi closed, but PDF is an ISO standard(1) and mobi is not backed by any standard organization.

1) http://www.iso.org/iso/pressrelease.htm?refid=Ref1141

What's wrong with PDF support on Kindle?

PDFs are just a terrible eBook format. They bake in a fixed page size, usually 8.5x11 inches.

The Kindle's screen being physically smaller than that, your display options are limited to scaling an image of the 8.5x11 page down to fit into 4.8x3.6 screen, at which point fonts are generally too small to read, or attempting to reflow the PDF's contents on-the-fly, which is noticeably slow and typically only gives acceptable results if the PDF contained an absolute minimum of formatting.

Kindle DX should display a 8.5x11 pdf correctly. I haven't used one personally though.

Trying to turn pages on a PDF being displayed on a Kindle makes me want to punch kittens. Multiple. Because that's how much time I have between. Each. Page.