Referrer's Log in Javascript

Near the bottom of my sidebar, I have a script to list my referrers from the last 24 hours (original source here). Sometime in the last couple of weeks, it went wonky on me, only listing one or two people. But, and this is really odd, it's only acting up on my home PC, and if I check my site from work the referrer log is nice and long, like it should be (and used to be at my home PC).

Here's the snippet from my template, which hasn't been changed (I've replaced the 'greater than/less than brackets with square brackets):

[script language="Javascript" src="http://blog.mu.nu/referrers.js"][/script]

Any ideas for what might be happening?