After upgrading from 7.8 to the new 8.0 on a 32 bit system the KDE does not display properly. The problem is items like the icons on the panel do not display, however, they do work if you can find the one you want, so it is just a display problem. See attached image. Related is the fact when an application is run dialog boxes do not display until the mouse cursor is rolled over them causing a change, then that part displays, such as a button.
There is no problem with my 64-bit version that upgrade is perfect, this only happens on my 32-bit system.