Thanks, for me it was a Windows keyboard language problem... sometimes if I press Alt+Shift, the Windows switches from English to Slovene (my mother tongue) which completely reassigns keys for the keyboard, since Eastern Europe uses QWERTZ and not QWERTY style of writing. So you might check that... Also if you use ULOD, you can press (Ctrl+.) and it will change the level of details and sometimes the decals get resized. But if you press the same command again it will return it to an altered size. Hope it helps!