No. I think you're right about the css though. I didn't change the css for this widget but I have done some tweaking of the css's at a higher level. That has to be the problem.
Sent from my iPhone
When someone tweaks the search widgets css is the only time I have seen it act the way your screenshot is showing. Can you remember what css rule you changed?
I just changed color for the
.claro.dgrid-header .dgrid-cell in the ...\LaunchpadTheme\styles\default\css\dojo-override.css.
Nothing that should have affected this.
When I use the Inspector in Chrome, the element.style width = 190. When I change it in the Inspector it's fine.