There is no scrollbar for large settings pages directly invoked. E.g. I clicked opened the power settings via the power manager applet in the systray. When opened directly there is no scroll bar and I cannot get to the apply button. When opened through system settings there is a scroll bar and everything works great. My display resolution is 1366x768
I can confirm the problem with power management kcm started from tray icon on my laptop with 1366x768 screen. Severe usability problem.
*** This bug has been marked as a duplicate of bug 378498 ***