I havn't checked post 1800 - the early records were a mess - there were several 'batch' replacements (many of which claim birth not baptism dates) that had numerous misreads of names etc - I used the 1911 transcription and checked some against the actual register (which is also an untidy mess for the early years - the 1911 were ok it was the IGI misread of the 1911 that was the problem) but since most of the IGI entries for 1810-1820 period seem to be other than extracts from parish reg I'd double check all of them against the parish reg film