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The typical diagnostic steps to verify that the problem is what you think it may be...
Uninstall the suspected program, restart the phone and then check if the problem exists or not.
If the problem does get resolved... reinstall the program, restart the phone and check again. Many times a program can get corrupted during and install... this verifies if it is a conflict or was just a corruption.
That's generally true, yes, but I believe that the OP is talking about the Holo Launcher. If Holo was the only launcher installed, either it cannot be uninstalled or it could be dangerous to uninstall it.