You were both right - updating to version 5 fixed the problem more or less! Only in one case there is still a problem with lower and upper case letters, but for the other cases it's working now!
-- You received this message because you are subscribed to the Google Groups "tesseract-ocr" group. To unsubscribe from this group and stop receiving emails from it, send an email to tesseract-ocr+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/tesseract-ocr/e8563427-d531-4589-a178-e8bdee4a8e7b%40googlegroups.com.