Buttons CSS issue

Hello and thanks for the great plugin, it’s almost the only one of this kind that ouputs beautifull buttons( including the flat ones that others miss).

The plugin works good but I have a different CSS problems. Since I set up a new theme on my blog and done a little something here and there checked my site with W3C and with your buttons plugin activated the noticed errors raise from 50 or so to 652, mostly of them being something like .cbbtn .clearfix Parse Error {*zoom:1;.

Do you knowwhat could be the problem and if it has a bad inpact on anything?

https://www.ads-software.com/plugins/bootstrap-buttons/