Text expander 'read more' links stop working

I'm using kswedberg's fine Expander jQuery plug and have a curious problem. The script works a charm for a few minutes then refuses to expand the text after a short time. See it here BG Site in progress

Click 'Home' and see the Expander plug working inside vTicker. The plus signs are the expander links.

Many thanks for looking into this... my first guess is using jQuery 1.4.4 (which I am locked into)