QuickLaTex: unexpected shadows around formula

After having installed QuickLaTex i have observed (in two or three browsers) that each formula is surrounded by a shadow. The css at the formula/image level seems to have declared box-shadow: 0 0 4px rgba(0,0,0,0.2). To help myself i have added the line “box.shadow: none !important;” to “ql-img-inline-formula”. For me it worked and i wonder whether it might be a general issue because normally, shadows around formulas or even inline-formulas do not make much sense to me. I also wonder why this observation has not been reported by others.

You can see the issue on the page mentioned above in teh text of second chapter 1, “Herleitung …”.

The page I need help with: [log in to see the link]