And I quote:

self.cleanUrl = function (sourceType, dirtyURL) {
dirtyURL = dirtyURL.replace(/^\s+/, '');

for (var group in MB.constants.CLEANUPS) {
if(!MB.constants.CLEANUPS.hasOwnProperty(group))

var cleanup = MB.constants.CLEANUPS[group];
if(!cleanup.hasOwnProperty('clean') || !cleanup.match.test(dirtyURL))
continue;

return cleanup.clean(dirtyURL);
}
return dirtyURL;
};

Presumably needs a line:

dirtyURL = dirtyURL.replace(/\s+$/, '');

or some way of combining that into the existing line