Just wanted to make it available that one user reported issues with the height of Impromptu in Safari and Opera. Along with that they also offered a quick fix for those who are able to correct their own until I’m able to revise Impromptu. The fix is to replace the css attributes for jqib in the source in the positionPrompt function to set height with the following:

height: $.browser.safari||$.browser.opera?document.documentElement.clientHeight : $window.height(),

Hope this helps anyone experiencing trouble