Odd errors in hazel.log

Looking at errors on my system (Lion 10.7.0) I found the following in hazel.log:
2011-09-04 05:31:08.247 (null)[0] Error creating FSRef for path AAAAAAFQAAIAAQxNYWNpbnRvc2ggSEQAAAAAAAAAAAAAAAAAAADDRzqGSCsAAABPYbQJRG93bmxvYWRzAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAE+C9sQr+YUAAAAAAAAAAP////8AAAkgAAAAAAAAAAAAAAAAAAAAB2pnY2xhcmsAABAACAAAw0csdgAAABEACAAAxCvrdQAAAAEACABPYbQASazPAAIAJE1hY2ludG9zaCBIRDpVc2VyczpqZ2NsYXJrOkRvd25sb2FkcwAOABQACQBEAG8AdwBuAGwAbwBhAGQAcwAPABoADABNAGEAYwBpAG4AdABvAHMAaAAgAEgARAASABdVc2Vycy9qZ2NsYXJrL0Rvd25sb2FkcwAAEwABLwAAFQACAA7//wAA: -43 - File not found
2011-09-04 05:31:08.247 hazelfolderwatch[35014] Error creating alias. Could not get FSRef for path: AAAAAAFQAAIAAQxNYWNpbnRvc2ggSEQAAAAAAAAAAAAAAAAAAADDRzqGSCsAAABPYbQJRG93bmxvYWRzAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAE+C9sQr+YUAAAAAAAAAAP////8AAAkgAAAAAAAAAAAAAAAAAAAAB2pnY2xhcmsAABAACAAAw0csdgAAABEACAAAxCvrdQAAAAEACABPYbQASazPAAIAJE1hY2ludG9zaCBIRDpVc2VyczpqZ2NsYXJrOkRvd25sb2FkcwAOABQACQBEAG8AdwBuAGwAbwBhAGQAcwAPABoADABNAGEAYwBpAG4AdABvAHMAaAAgAEgARAASABdVc2Vycy9qZ2NsYXJrL0Rvd25sb2FkcwAAEwABLwAAFQACAA7//wAA
This repeats every minute. (There are also expected rule logging messages, as I have turned verbose logging on.)
Any idea what this means, and how to cure whatever the underlying problem is?
2011-09-04 05:31:08.247 (null)[0] Error creating FSRef for path AAAAAAFQAAIAAQxNYWNpbnRvc2ggSEQAAAAAAAAAAAAAAAAAAADDRzqGSCsAAABPYbQJRG93bmxvYWRzAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAE+C9sQr+YUAAAAAAAAAAP////8AAAkgAAAAAAAAAAAAAAAAAAAAB2pnY2xhcmsAABAACAAAw0csdgAAABEACAAAxCvrdQAAAAEACABPYbQASazPAAIAJE1hY2ludG9zaCBIRDpVc2VyczpqZ2NsYXJrOkRvd25sb2FkcwAOABQACQBEAG8AdwBuAGwAbwBhAGQAcwAPABoADABNAGEAYwBpAG4AdABvAHMAaAAgAEgARAASABdVc2Vycy9qZ2NsYXJrL0Rvd25sb2FkcwAAEwABLwAAFQACAA7//wAA: -43 - File not found
2011-09-04 05:31:08.247 hazelfolderwatch[35014] Error creating alias. Could not get FSRef for path: AAAAAAFQAAIAAQxNYWNpbnRvc2ggSEQAAAAAAAAAAAAAAAAAAADDRzqGSCsAAABPYbQJRG93bmxvYWRzAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAE+C9sQr+YUAAAAAAAAAAP////8AAAkgAAAAAAAAAAAAAAAAAAAAB2pnY2xhcmsAABAACAAAw0csdgAAABEACAAAxCvrdQAAAAEACABPYbQASazPAAIAJE1hY2ludG9zaCBIRDpVc2VyczpqZ2NsYXJrOkRvd25sb2FkcwAOABQACQBEAG8AdwBuAGwAbwBhAGQAcwAPABoADABNAGEAYwBpAG4AdABvAHMAaAAgAEgARAASABdVc2Vycy9qZ2NsYXJrL0Rvd25sb2FkcwAAEwABLwAAFQACAA7//wAA
This repeats every minute. (There are also expected rule logging messages, as I have turned verbose logging on.)
Any idea what this means, and how to cure whatever the underlying problem is?