I'm currently using Moodle 2.9.6, I mostly use regular expression in the short answer question page since Moodle 1.9. But the patterns I use since that version, now they don't quite work. For example:
.*dicotómica.*/i tells that the phrase most have the word dicotómica and it is case insensitive. But when the student capitlizes the whole word, the system doesn't recognize the word, only when capitalizes the first letter.
Are there new rules for regular expressions?