(In reply to comment #0)

It flipped the y-offset for some reason:

ltr: text-shadow: #333333 0px -1px 1px, #FFFFFF 0px 2px 1px;
rtl: text-shadow: #333333 0px 1px 1px, #FFFFFF 0px 2px 1px;

When you say "it flipped," what is "it"?

Is this a ResourceLoader bug?

See the numbers in the rule? The -1 became a 1. It flipped.

Is resourceloader what flips the interface for rtl languages?

(In reply to comment #2)

See the numbers in the rule? The -1 became a 1. It flipped.

Yes, the CSS changed (flipped), but what changed it? Where did you see this? What were you doing when this happened? Are there exact steps to reproduce?

I don't know; where does mw flip the interface css for rtl languages?

I was juggling ostriches on the moon at the time. I suppose to reproduce it you would have to go to the moon and juggle ostriches, then. Oh, and put something like what I pasted above in a file that gets flipped, probably. Unless it really was the ostriches what did it? Now there's a thought.

URL and screenshot welcome.

(In reply to comment #0)

ltr: text-shadow: #333333 0px -1px 1px, #FFFFFF 0px 2px 1px;
rtl: text-shadow: #333333 0px 1px 1px, #FFFFFF 0px 2px 1px;

There are two shadows defined here, and ResourceLoader (or actually CSSJanus) only supports flipping the first one in a rule right now. :(

I added the half-baked feature in I97ee7431 to fix bug 45677.

(Rephrasing the summary and moving to a better component.)

Ah, thanks. That explains it (and why this seemed so familiar, d'oh).

@matmarex Can you make sure this is reported in the CSSJanus issue tracker, and link it from the task description?

In T62805#4301945, @Imarlier wrote:

If this issue still exists, it should be reported to the CSSJanus issue tracker.

...and https://www.mediawiki.org/wiki/Upstream_projects says that is https://github.com/cssjanus/cssjanus/issues

Filed https://github.com/cssjanus/cssjanus/issues/62