I tracked the problem down. I'll post here incase it might help somebody else.
Line ~64 V.1.2.2
if ($.browser.msie && $.browser.version.substr(0,1)<7) {
$sourceParent.html('').append($collection);
return;
}
The substr returns 1 causing the plugin to quit.
I fixed this by removing the substr (could anyone explain why the substring is necessary?):
if ($.browser.msie && $.browser.version<7) {
$sourceParent.html('').append($collection);
return;
}
which seems to work fine.
Versin 1.3 (which I didn't realise exists) of the plugin uses the following:
if ($.browser.msie && parseInt($.browser.version, 10) < 7) {
$sourceParent.html('').append($collection);
return;
}