Bridge doesn't respect file/folder rights
If some files/folders in folder media have rights that make them unaccessible to Bridge and one tries to replace/remove them or add new files/folders everything crashes. Sometimes Bridge says that it can't upload some file, sometimes not. Corresponding lists of files/folders break.
Normally this shouldn't happen since Bridge totally controls both a database and folder media. But sometimes, e.g. when somebody invokes Bridge functions not through sending requests to web servers, one can break folder media.