browser problem in a wordpress site

This is the site: [url removed, login to view]

It present problems with IE and Opera

Topmenu

Fonts

Columns order

I can not understand why because the template is the same with FF or Chrome or IE so why just in these browser make these problems

Thank you

Unternehmensanalyse Business-Pläne Ingenieurwesen Odd Jobs Softwarearchitektur Testen von Software Virtueller Assistent Bildende Künste

Projekt-ID: #3726047

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