CSS rules "display: flex" and "writing-mode: vertical-rl" cause rendering problems Topic is solved

[clth7tt3kda]

Pale Moon 27.3.0, 64 bit. Try messing with https://codepen.io/clth7tt3kd/pen/bWPqYv.

[GMforker]

Last bad: Firefox 41.0a1 (2015-05-16)
Built from https://hg.mozilla.org/mozilla-central/rev/f1bb9cfd7661

First good: Firefox 41.0a1 (2015-05-17)
Built from https://hg.mozilla.org/mozilla-central/rev/2f6ea66057fe

Pushlog:
http://hg.mozilla.org/mozilla-central/p ... 6ea66057fe

bug #1158290 is the suspect.

But see also bug #1152913.