text-anchor support on vertical text seems slightly off (shifted down a little)
See referenced test case.
Created attachment 14833 [details]
We're going to fix this by having Niko break out the glyph height logic into platform specific code, and then we'll let one of the various platform font experts build working solution.
It turned out, that it's actually a bug in our text engine - fixing it right now.
*** This bug has been marked as a duplicate of 15937 ***