Hey Guys,
what i found out so far is, that when i connect from home to my Win7 Workstation in the Office via RDP, the Fonts in vSphere Client look Crystal clear to me, as they should be. When i am back in Office i try to turn off some of the Visual Effects in the Properties (Control Panel -> System and Security -> System -> Advanced System Settings -> Performance -> Settings -> Visual Effects) maybe one of them is the root cause for this issue. But if so ... i wonder why only vSphere Client is affected. I will keep you updated ...
Regards,
Bjoern