[Dovecot] v2.2.13.rc1 vs. Pigeonhole

[Tamsy]

Server: Ubuntu 10.04 LTS 32bit

There seems to be an incompatibility when compiling Pigeonhole against
Dovecot v2.2.13.rc1.
# make check
with Pigeonhole throws up the following error message:

<snip>
Test case: ./tests/extensions/editheader/addheader.svtest:

 1: Test 'Addheader - first' SUCCEEDED
 2: Test 'Addheader - last' SUCCEEDED
 3: Test 'Addheader - framed' SUCCEEDED
 4: Test 'Addheader - folded' SUCCEEDED
 5: Test 'Addheader - newlines' FAILED: wrong first header content in
redirected mail
 6: Test 'Addheader - implicit keep' SUCCEEDED
 7: Test 'Addheader - UTF 8' SUCCEEDED
 8: Test 'Addheader - devious characters' SUCCEEDED

FAIL: 1 of 8 tests failed.

I tried this with the latest Pigeonhole from Mercurial:
- dovecot-2-2-pigeonhole-3b6917a4807c
and also with the older:
- dovecot-2-2-pigeonhole-e111a2393a92

Both versions are quitting during "make check" with the same error when
compiling against dovecot-2.2.13.rc1.
Compiling those versions against dovecot-2.2.12 is going without errors
though.

Cheers,
Tamsy