#325810 by darren.ferguson, miglius: in tableheader.js $('td'+ location.hash).offset() does not alway return an object, which breaks all JavaScript on the page, so check for the return value before using it.

#184143 by redndahead, tested by yoroy, quicksketch: tableheader.js interfered with #anchors in table rows

#208991 by JirkaRybka: target sticky table headers to Drupal output tables only, so it won't sticky random tables in other site content

#208197 by dvessel: back to cloning the table header only in tableheader.js (fixes radio button issues and Safari 2 crashing)

#194590 by scor, JirkaRybka, attiks, dvessel; with heavy testing by catch: fix a dozen issues with sticky table headers

- Patch #179937 by quicksketch: made the table header magic more robust.  When a table disappears from the HTML, an error would otherwise be thrown.

#171866 by kkaefer and dvessel: prevent the tableheader script from running in IE less then v7, because of incompatibility

#134307 by dww, Stefan Nantegaal and dvessel: fix table headers interaction with Safari, so the fieldset contents will not disappear