Was helping a fellow td user resolve a problem which required and upgrade to the 5x series experimental builds. However, even in the default preset load the entire ui seems broken. Alot of invisible panels, broken text, menu items etc. Completely unusable.
64bit 50880
64bit 50500 and 32 bit 50500 versions
Windows 8 64 bit. My laptops a few years old too - nvidia 680m i7 2.4ghz
Screenshot attached.