When there are multiple text-shadows on a tspan element it does not render correctly when the zoom level is changed from the normal 1.0 zoom level (either zooming in or zooming out will do it). It appears like it is correctly zooming only the first text-shadow on the element and doing something weird with all the other ones.
A normal span element with the same set of text-shadows renders correctly at different zoom levels.
Reproduced with Safari 5.1.7, 6.0.2, WebKit r144443 and Chrome 25.0.1364.99.
Created attachment 191026 [details]
TEST - tspan, TEST2 - span
This bug still exists as described by the original author, in Safari 9.1.1, on both Retina and non-Retina displays (so it seems to be different to #139810, which happened only in Retina ones). Happens also with Safari on iOS 9.3.3.
The is no test case attached here. The url https://ultralink.me/svgTextShadowTest.html is not working.
When trying to create a text case similar to the attached screenshot, I found that with applying only a single text-shadow to the <text> element and zooming the svg, the display can be incorrect. I am attaching the test case and a screenshot showing the different between Chrome and Safari showing the same test case with the same zoom factor.
Created attachment 291133 [details]
Created attachment 291134 [details]
Test case screenshot