works for the Internet Explorer-specific version of Update Catalog.
So they've managed not only to screw up searching by hardware identificators (which is far useful for locating newest WHQL'd drivers) and how the results in general were less accurate, but also they screwed up searching at all for the non-IE version. nice,
EDIT: seems to be back now, for non-IE browsers, and they have finally unf***ed searching by HWIDs.