I have three web apps in a one WFE farm.
I have not fooled with any CSS or javascript or master pages.
In the first web app, the horizontal scroll bars work just fine.
In the other web apps, I don't have horizontal scroll bars anywhere.
And - if I move a content data base from the first web app (where there are scroll bars) and attach it one of the other web apps - the horizontal scroll bars disappear.
Can anyone help diagnose this?