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(( I believe the last statement is inaccurate.
In addition, when clicking to move elsewhere, often the game makes to run exactly on top of a nearby (or even further) corpse instead, including in the opposite direction. Corpses also prevent the player from picking up dropped items nearby until they disappear.
Slain monster corpses can often obstruct the player from picking up remains, noticeable when the lever cursor is displayed but clicking has no result or the "Remains" text keeps flashing. The Storage acts like a Merchant Interface, so if you have fewer than 1 Oren, you cannot make a withdrawal.) (I just encountered this issue myself, and it occurs when you have 0 Orens in your inventory. In some cases when you store items once the items are stored, attempting to retrieve them results in a no-op and you cannot get your items back. Storage does not allow you to retrieve items. In some cases in Chapter II, if you place the sephirots as soon as you get them the quest will break, rendering the quests A Mysterious Tower and Monoliths uncompletable. Contrary to its description, the Quen Sign renders Geralt invincible rather than providing damage absorption based on Sign level. Shani may disappear completely if in Chapter II you manage to get both the Old Friend of Mine quest to advance to "Bring Liquor" and the Anatomy of a Crime quest to advance to "Get the corpse from the Gravedigger". (Seems to happen when you manually save over an autosave.) When loading some saves in Chapter I, the game plays the cutscene from the beginning and then freezes. Crashes continue to occur when saving or using the Journal or Inventory after having used Alt+Tab or Ctrl+Esc frequently (usually more than ~ 5 times) during a gaming session. If you run the game normally through the launcher, the game may crash after 20 minutes or a few hours of gameplay. See Technical Information for a Vista-specific tip. Others seem to be able to run it without crashing too often.
Frequent crashes have been reported by some people playing on Windows Vista. Random crashing, often when (auto)saving.