Improved error handling in Logger

Ignore-this: fd54d6469c1c9d8465819633031f9fc4

darcs-hash:20090827103742-1e3d8-afbb40de0842312dc0376f414b127445bbf5c86a
Fixed typo slots/slot in AudioStream

Ignore-this: be326d204b8ed93fc5abd747abbe9421

darcs-hash:20090828084253-1e3d8-373b8071abefff3d0eeff821400c075456045367