The SVG specification states (<URL: http://www.w3.org/TR/SVG/implnote.html#PathElementImplementationNotes >):
> Do draw the linecap for zero-length path segments when
'stroke-linecap' is set to either round or square. (This allows round
and square dots to be drawn on the canvas.)
This is not implemented by Firefox 3.5 or 3.6 (I believe Firefox 3.0 was correct, however, so it's a regression), at least under certain Linux versions (I suppose it is due to the implementation backend: tested under Debian 5.0.6 Lenny=testing, and Ubuntu 10.04 Lucid Lynx LTS).
Example problem: the page <URL: http://www.madore.org/~david/.tmp/higman-sims-17-0ls.svg > should render identically to <URL: http://www.madore.org/~david/.tmp/higman-sims-17.svg >, but is missing the thick red dots.
Bug #355842 was apparently similar, but closed a long time ago (another sign that this is probably a regression).
FWIW, Chrome apparently suffers from the same bug: <URL: http://code.google.com/p/chromium/issues/detail?id=21057 >.
Round works on trunk. Marking this a duplicate of the existing square bug.
*** This bug has been marked as a duplicate of bug 589648 ***