Comment 2 for bug 1512729

Reproduced with Inkscape 0.91 and 0.91+devel r14441 on OS X 10.7.5.

Based on tests with archived builds:
- not reproduced with r10326 (just after the merge of the cairo rendering branch)
- reproduced with r10588 (just before the removal of libnr)
the regression seems to have been introduced between r10326 and r10588.

Possibly related major commits (speculative for now):
* Merge SPCanvasArena caching layer work in r10451:
https://bazaar.launchpad.net/~inkscape.dev/inkscape/trunk/revision/10451
* Merge rendering cache branch (GSoC 2011) in r10579:
https://bazaar.launchpad.net/~inkscape.dev/inkscape/trunk/revision/10579