open TextEdit. type "File:///". The capital 'F' is important. On the third /, it crashes. 2013-01-31 15:19:47.422 TextEdit[34715:6903] assertion on /SourceCache/DataDetectorsCore/DataDetectorsCore-269.1/Sources/PushDown/DDResultExtraction.c:1576 "CFStringHasPrefix(urlVal, CFSTR("file://"))" failed :wrong extraction: File:/// 2013-01-31 15:19:47.423 TextEdit[34715:6903] wrong extraction: File:/// 2