Exchange 2007 SP1 rollup 3 OWA issues?

I've seen some posts around that others are having issues with OWA after applying rollup 3 for SP1.  We got it this past weekend.  Essentially after applying and trying to access OWA, a blank page is all you get.

After digging around, uninstalling and reinstalling, none of which worked for us, one of the guys where I work (our man "Stuff") found that there seemed to be a change of code in logon.aspx from rollup 3.  We changed

var a_sLgn = "<% RenderLogonHref(); %>";

To

var a_sLgnQS = "<% RenderLogonQueryString(); %>";

In our case we've heavily customized our logon page so when we copied the customized logon.aspx from previous builds it didn't quite work.  One of these days we'll have to redo our custom theme from RTM code to SP1 code.  Most everything still works but rules, and deleted item recovery screens are pretty broke.