I am using this time-picker plugin.
labs.perifer.se/timedatepicker/jquery.timePicker.js
It works fine with jquery 1.2. see here.
labs.perifer.se/timedatepicker/
but when used with jQuery 1.3 IE is throwing some errors.. like Error: ‘jQuery’ is undefined. I am using IE 8.
Sounds like you have a typo in the path your loading jQuery from. Double check your file names, paths and compare with whats in your script tag or alternatively load jQuery directly from google:
http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js
Then you never have to worry about path typos or the wrong file version again.