eBay is constantly changing code and breaking things. For example, starting last Friday on the ebay.com site, instead of getting the eBay logo in the upper left hand corner, there's a partial .jpg of a button that says "write". This seems to only affect certain Firefox users so of course it's not fixed yet, 3 days later. At least they got the Javascript fixed.
The glitch I love the most, though, is the one where you log into your account and see "Not a registered user" next to your User ID. After that fleeting moment of panic, you realize that you are, in fact, still registered, and it's just an eBay "thing" that goes away after a couple of minutes.