[one-users] ec2 access problem after upgrading to ONE 3.0

[Schwickerath Ulrich]

Hi, all,

we've recently upgraded our internal cloud to ONE3.0, and since then one of our major customer has problems to connect to it. Everything works with euca-tools, 
but this customer is using the perl EC2 client implementation from Amazon, specifically

#  Amazon EC2 Perl Library
#  API Version: 2010-06-15
#  Generated: Wed Jul 21 13:37:54 PDT 2010

Since the update we get authorization errors. The logs are not conclusive. We are running an SSL proxy, and the apache logs only show 
128.142.192.52 - - [10/Oct/2011:18:39:22 +0200] "POST / HTTP/1.1" 400 139
(ssl_access_log)
[10/Oct/2011:18:39:22 +0200] 128.142.192.52 TLSv1 DHE-RSA-AES256-SHA "POST / HTTP/1.1" 139
(ssl_requests_log)
The error code translates into a user authorization error. As I said, the same works fine with euca-tools

I've tried both with HmacSHA1 (which he used until now) and HmacSHA256, none of them works. 

Has anybody come across this  before?

Any hint welcome !
Cheers,
Ulrich