From PhilPapers forum Discussion of PhilPapers, Misc:

2013-03-30
Erroneous BibTeX export in some cases
Reply to Clea F. Rees
Just to add an example of the BibTex-export issue pointed out by Clea F. Rees:

http://philpapers.org/rec/NOOATV

The page numbers are correctly listed on the website as 131-134, but BibTex-export returns:
pages = {131--8211}