[Vooloc]

ive mostly read actual epubs on my nook and of course they read great but recently ive converted some pdf's for it, ive been reading one and mostly it is ok but towards the end it randomly threw a few earlier pages back in towards the end.
this makes me wonder if there are some settings in calibre i need to look at.
are there any boxes that definetly need ticking or something needs changing with the program to get better results?
im running it with everything as default settings.

[Window Bar]

I cannot answer your questions about Calibre, as I've never used it. But I too own a Nook, and have found that many of the free novels available on the Net are available only in PDF, some of which were working very poorly on the Nook.

There seem to be several generations of PDF. The earlier PDF-file books do not have pour-able text at all; they can be be viewed only in the full-page blocking that exists in the original file: which invariably renders a typeface that is too tiny to read. My solution has been external. I simply wear a pair of very high-magnification reading glasses over my normal glasses. A very low-tech but effective solution.

The later PDF conversions (which flow almost as well as an ePub file) are still not perfect. They almost always have the type of problems you have described... especially non-fiction books containing footnotes. If the chop-and-glue has not been severe, then I'll read them as PDFs and put up with the occasional anomaly, doing the type-size adjustments with the Nook's controls. However, if the problems are severe, I'll display them in their original page layouts (once again in microscopic size), and I'll read them by reverting to my solution explained in the previous paragraph.

A pair of magnifying reading glasses with quite serviceable optics rarely costs more than $10, and for me at least, this has been a very workable fix.

Good luck -- WB