TYPO3 Core

We have a SVG image for customer logo, which is shown at the BE login.

When displaying the SVG only you can find pseudo tags with width="885.024px" height="217.696px".
So the logo is to wide for the login box it is scaled down to a with of 290px.

And so the CSS says height:auto; the display height used is 217px in IE (FF and chrome display it correct)

.typo3-login-logo > img {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 0 auto;
}

Changing the backend.css (in the debugger) to height:100%; fixes the display for me.

TYPO3 7.6.11
IE 11.0.9600.18499 (11.0.36)