i found a solution… see below… Why i have to do this is still amazing to me…
I used this in my Style Sheet:
/* Tweet button width hack */
twitter-sharer iframe {
width: 60px !important;
}
You will, of course, need to find your own ID for where your twitter button is, as it most likely is not #twitter-sharer.
https://dev.twitter.com/discussions/5994