Recently, I upgraded to 1.9.x, and also added the Semantic MediaWiki Extension.
Now, I have all tables that were marked as sortable have two sets of sorting buttons for each header cell.
Reference: http://simopedia.servopro.com/wiki/Template:TV_Channel_Reactions
I thought that it might be because there are now two sorttable.js scripts, one for MediaWiki, and one for Semantic, but when I commented out all the lines in the MediaWiki skins/common/sorttable.js, there were no buttons left.
Can anyone help? Thanks.