CSS and/or PHP problem please help

[topflight]

I have 2 boxes one for main content(Left big box) and the other for side navigation(right small box) and for some reason when the main content box gets bigger the side content box gets bigger and that's what I am trying to fix. This problem only occurs in Firefox and Internet Explorer, in google chrome everything seems to be fine. Please help thanks.

 

Also note that this pic was edited of course those 2 content box have text in it

 

Here is a little more details

 

Thanks in Advanced.

[shadiadiph]

looks like a css problem probably need to give the small box its own css code with a fixed width and height maybe need to use vertical-align: top;

 

there is also a possibility the white space is displaying a php error try right clicking and view source.