[imp] Option page blank when the mailbox is empty

[Paolo Cavicchini]

Hello,
I'm using the last current version of HORDE/IMP/etc.
I'm experiencing again a problem that I've notified as bug in the last
version: 

if my mailbox is empty, I cannot use the "Option" page: IMP shows me a blank
page.
If my mailbox contains one or more messages, I can use the "Option" page
without problem.

Can anyone give me any suggestion?
Thank you
Paolo