Comment 5 for bug 427288

some more information

on the same system described above, doing additional things removes the warning:

$ echo 'hwcap 0 nosegneg' | sudo tee -a /etc/ld.so.conf.d/libc6-xen.conf
$ sudo ldconfig
$ sudo apt-get --purge remove libc6-i686

Eric pointed at
 - http://groups.google.com/group/ec2ubuntu/browse_thread/thread/1a3fd33f04766361/8f82524bd298a4a2
 which links to
 - http://wiki.xensource.com/xenwiki/DebianTlsLibcDiversion

So it appears we can find a solution, but I think at the moment every thing I see has negative effects on non-xen systems.