@Shadowfen: Well, if I had this issue in Vanilla, I wouldn't be concerned. As far as I realized now, I managed to find a problematic mod - Finite Ammo (http://www.tesnexus.com/downloads/file.php?id=27731) With this mod installed, I can not quickload in a running game and quickloading in a completely new game causes a black screen for a second. Without this mod, quickloading in a new game is immediate (no black screen), though I can not load a previously saved game, the game crashes when I try to. I can't be sure it's all this mods fault (i have a LOT of mods including those for archery), but if anyone experiences the same problem as I did, he may find turning this mod off useful.