from pybliographer-list [1]; improvements include "check [for] eventual modification of the file by an external program before overwriting; fix[ed] some problems with the bibtex parser (especially during conversions); improve[d] parsing of Ovid files (keywords, journal)." Check it out at the gnome pyblio home [2].
Links:
[1] http://lists.sourceforge.net/mailman/listinfo/pybliographer-general
[2] http://www.gnome.org:65348/pybliographer/