[imp] ugly view in Inbox with Firefox

[li at elaboratio.com]

Hello, 

I use IMP 4.0.1 with Horde 3.0.2.
Its not a Horde/IMP problem, but about the way Firefox handles the html/php code:

When I login to the Inbox the first time, the displayed messages are shown
crowded on the left side and the td of the table is only so large as the preview
texts.
Reloading the page, the table is shown over the entire window and looks nice...


Could somebody indicate the file and the change I need to do to avoid this
aestethic detail?

Thank you.