CSS error in included css file

[a-schild]

In the included CSS file, the firs line has a incalid CSS rule:

.v-popupbutton. .v-button-wrap * {
float: left;
}

It should be this:

.v-popupbutton .v-button-wrap * {
float: left;
}

Note the removed dot character after the v-popupbutton