Items displayed in all browers except FF???

[Huskytom]

Hello there,
today I saw a strange problem with my guestbook.
Usually I use the newest Firefox; I checked the page - saw 5 items in the guestbook - allright. After a while (and refreshing the page) only 2 items
So I checked Opera, Chrome, and IE8. Everywhre the 5 items!
I checked the backend in the several browsers too. All 5 items were displayed - with the exception of FF....

I don´t have the foggiest idea

[Huskytom]

I start to believe in miracles
Today everything is fine - without doing anything

Thanks for your attention - thread could be closed..

[Benno]

Ok.
Kind regards,
Benno