Hi @hunter, I’m sorry to say but my problems didn’t go away even after clearing site & browser caches. But immediately when I revert to 4.4.0.1 the view is back to normal.
I now kept the 4.4.1 on the site, you might take a look:
Naistenpäiväviikon serenadikonsertti
The problematic button is obviously “Lisää ostoskoriin” (“Add to cart” in Finnish).
Attached also an image about the situation.