apparently the web-item and byline item connect modules stopped outputting icon width and height attributes.
Since we use images with a higher resolution than specified in module declaration (for improved looks on HiDPI screens) these icons are suddenly displayed with twice the intended size.
This only happens for some users and we could not figure out a pattern so far.
I added some screenshots to this issue: https://ecosystem.atlassian.net/browse/CE-1115
Is this a known issue?