Posemode, ALT+R,G,S didn't work always, this because SHIFT+mouse selecting

accidentally could unselect the object itself.

It can be that older saved files still show this issue, then just select
another object, and select the armature again. :)

source/blender/src/editview.c

@@ -1295,6 +1295,9 @@ void mouse_select(void)
 						basact= NULL;
 					}
 				}
+				/* prevent bone selecting to pass on to object selecting */
+				if(basact==BASACT)
+					basact= NULL;
 			}
 		}
 	}