well, really I don't know then.... :(
What I've seen is that in you page there were two jquery libraries called, and one was version 1.7.1 (I think I remember that...) and was called from that widget you removed, "shop my stuff".
So when there are two different versions of the same files this may lead to some conflicts. But I don't know if this is your case.
What I would do is to make an export of posts and pages from within wordpress, make also a complete backup of database and files, then reinstall manually the latest wordpress version, and check if this problem is gone.
If it is, then reinstall latest version's theme and plugins used before, one by one making a single test for each step.
Here are some resources for Upgrading WordPress as well as advanced infos on this topic
I'm sorry I couldn't help you right now, you can try to wait a little if someone had this same issue resolved and answers to this thread, otherwise try this last step that should fix it, but surely taking some more time and some effort to do it precisely without problems...
Good luck, hope you solve it!!! Feel free to ask more if you need, as far as I can suggest something useful I will do it..