libcurl built with gnutls ignores a rehandshake request

I have a small python application which uses pycurl to
download my bank statements every week. I was using
pycurl 7.13 built with openssl until recently and the
application worked fine. A few days ago I upgraded the
pycurl and the libcurl packages to 7.15.0
(pycurl.version reports 'libcurl/7.15.0 GnuTLS/1.2.8
zlib/1.2.3 libidn/0.5.18') and now my application fails
with this message:

* GnuTLS recv error (-37): Rehandshake was requested by
the peer.
* Empty reply from server
* Connection #0 to host www2.auth.net.hsbc.com left intact
Traceback (most recent call last):
.......................................
pycurl.error: (52, 'Peer closed the TLS connection')
* Closing connection #0

Looking at lib/gtls.c file, I found that the
Curl_gtls_recv function ignores a possible rehandshake
request from the server and returns an error, which
forces the server to drop the connection. Please
correct me if I'm wrong, but I think that a new
handshake should be issued if gnutls_record_recv()
returned GNUTLS_E_REHANDSHAKE.