WinterBoard is not working properly working on my iPhone 3Gs, whenever I install it on my iDevice, the iPhone will keep on crashing and will finally stuck at the Safe mode. However, if I uninstall these repos or sources, everything works fine.
WinterBoard is pretty smooth application; the problem is with any pirated sources on your iPhone. Please remove all the pirated tweaks or package and it will work as normal. Because pirated tweaks or apps have certain files that will mess up file system on your iPhone 4S, 4, 3GS and will cause instability.