Backreference substitution not working in Replace dialog

[FrDarryl]

Trying to reformat some Euro date strings (dd.mm.yyyy) to sortable (yyyymmdd).

I start with buffer containing:

foo 10.20.2011 bar
foo 05.30.2010 bar

Do a Search->Replace

'''Find Text:('''\d{2})\.(\d{2})\.(\d{4})[^\d]
''tick'' '''Regular Expression
'''
'''Replace Text:'''\3\2\1

After replacing (regexp matched twice but backreference syntax ignored):

foo \3\2\1bar
foo \3\2\1bar

It appears Scintilla is meant to support backreferences, e.g.,

​http://sourceforge.net/apps/mediawiki/notepad-plus/index.php?title=Regular_Expressions#Example_2

Cheers!