Firefox doesn't like my CI-based URL

[eluser]Derek Allard[/eluser]
I have 2 thoughts.

1) PHP errors are suppressed and that's why you're getting the blank screen. The error is causing output and thus not able to redirect. That seems unlikely given it only affecting 1 browser.

2) read this note on the URL helper's redirect function

The second parameter allows you to choose between the "location" method or the "refresh" method. Location is faster, but on Windows servers it can sometimes be a problem. Example:

Any chance you're on a windows box? I know you aren't using the URL helper here, but it could be the same issue.