Catch and ignore exceptions when saving users' history. These pop up frequently when the datastore is acting up but they are not required for the program to continue working normally, so they should not produce error messages.
Catch and ignore exceptions when saving users' history. These pop up frequently when the datastore is acting up but they are not required for the program to continue working normally, so they should not produce error messages.

git-svn-id: 062a66634e56759c7c3cc44955c32d2ce0012d25@394 c02d1e6f-6a35-45f2-ab14-3b6f79a691ff

taylorhughes/done-zo,taylorhughes/done-zo,taylorhughes/done-zo,taylorhughes/done-zo