I have OAP 3.3.2RC and I set up the defaults so that it opens the display in night mode and switching between day and night modes is manual. At startup, it goes into night mode on the display for a very brief moment then the map is displayed in day mode brightness. If I manually switch it, it stays in day light mode the first time (software thinks its switching from night to day). Manually switching it a second time causes it to revert into full night mode.