I have two mistakes in my custom css but they work :-)
 I know it is not a theme question but don’t know who to ask…
#footer-widgets .widget {
 text-align: bottom; 	expected (left-right-center but found bottom)</li)
 }
 .sow-image-grid-wrapper img:hover{
 opacity:0.5;
 filter: alpha(opacity=50); /* For IE8 and earlier */ (expected funtion filter list but found Alpha opacity)
 -webkit-transition: all 1s ease;
 -moz-transition: all 1s ease;
 -ms-transition: all 1s ease;
 -o-transition: all 1s ease;
 transition: all 1s ease;
 }
Greetings Ton Hermans
Hi Ton,
Regarding the first error, bottom isn’t a valid text-align value. As a result, that CSS will be ignored by the browser due to being invalid. Please give this MDN a read for more information.
Regarding the second error, it’s safe to ignore this one.