Using some of those wrapper libraries now... (xbDOM and xbStyle are very cool!)
patrick or whitaker ... can you test if logins work in IE5.5 now?
If you do login with IE5.5, the rest of the management area won't, because it hasn't been converted to use xbDOM where needed yet.
(Why does IE 5.2 for Mac kick so much more ass than 5.5 for Windows? Why aren't they the same codebase? *sigh*)