Reproduced with Inkscape 0.48.4 and current trunk r12000 on OS X 10.7.4.
Similarly, converting stroke to path produces no precise results for paths with such small stroke widths (as if hitting a lower minimal stroke width limit, somewhere close to 0.1 px) - in current stable as well as latest trunk (cairo 1.12.2, cairo 1.12.8).
Reproduced with Inkscape 0.48.4 and current trunk r12000 on OS X 10.7.4.
Similarly, converting stroke to path produces no precise results for paths with such small stroke widths (as if hitting a lower minimal stroke width limit, somewhere close to 0.1 px) - in current stable as well as latest trunk (cairo 1.12.2, cairo 1.12.8).