The plugin is causing an invalid html5 markup. most of the errors are:
"& did not start a character reference. (& probably should have been escaped as &.)" - due to the twitter query url structure
there is one: Consecutive hyphens did not terminate a comment. -- is not permitted inside a comment, but e.g. - - is.
<!-- Using OAuth - version 1.1 of API -- statuses/user_timeline -->
is there a fix on the way, or should I just hack/change the code to sort the problem.