I made some modifications to the code again. Actually a quite large mod to the way javascript is loaded. I rewrote parts of the Yii CClientScript to use jsmin.php(I based this on an Yii extension which was iirc ClientScriptPacker).
Now if I make a modification to any of the included javascript files, the minified source packs get automatically regenerated and served with cache-busting. This adds the inconvenience of having to add all used js-libraries in a common init function for all controllers.