When putting a horizontal form inside popover content, one of the controls/control-group classes does not appear to account for the form input width (but only for the label).
a fiddle would be helpfull..
but I'm guessing its the input tag that overflow the edges.. in that case put a span* on the input tag
What @Yohn said.
Didn't work ...but bumping up the value of .popover max-width did.