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This isn't my area of expertise either, but if you add a fake argument to your URL string like "&foo=bar" that should probably force a non-cached version. I'd check to see if there are any extensions available for your browser that do something like that.

we can only use internet explorer and i don't have admin access

So now you know that others in your company (or at least behind the same caching firewall as you) are HN users! :)

i see. i suppose that's why when i hit different links (e.g. ask, submit) i see different karma numbers unless i hit refresh

i'm Phoenix now. http://img402.imageshack.us/img402/6127/hn2i.jpg