Same problem here on two linux boxes.
Here are the files:
acct_mgr_request.xml
<acct_mgr_request>
<name>Moskito</name>
<password_hash>2ff6b9418763b38de623089e9069c3f7</password_hash>
<host_cpid>1c316ac1804fe0c886659d6d7f6edefc</host_cpid>
<domain_name>pc1.linux.home</domain_name>
<client_version>5.4.9</client_version>
<run_mode>auto</run_mode>
<prefs_mod_time>1109080619</prefs_mod_time>
<prefs_source_project>http://einstein.phys.uwm.edu/</prefs_source_project>
<previous_host_cpid>1c316ac1804fe0c886659d6d7f6edefc</previous_host_cpid>
<project>
<url>http://einstein.phys.uwm.edu/</url>
<project_name>Einstein@Home</project_name>
<suspended_via_gui>0</suspended_via_gui>
<account_key>062a2ead7421a3a9606f4d648086ae89</account_key>
<hostid>75576</hostid>
<attached_via_acct_mgr/>
</project>
<project>
<url>http://lhcathome.cern.ch/</url>
<project_name>LHC@home</project_name>
<suspended_via_gui>0</suspended_via_gui>
<account_key>4c4592827a25103f270614fef9a5bf3d</account_key>
<hostid>167507</hostid>
<attached_via_acct_mgr/>
</project>
<project>
<url>http://predictor.scripps.edu/</url>
<project_name>Predictor @ Home</project_name>
<suspended_via_gui>0</suspended_via_gui>
<account_key>1ed21c0b1e903bd6459f00c31ffec0f9</account_key>
<hostid>74381</hostid>
<attached_via_acct_mgr/>
</project>
<project>
<url>http://setiathome.berkeley.edu/</url>
<project_name>SETI@home</project_name>
<suspended_via_gui>0</suspended_via_gui>
<account_key>fd58e581b1a738be98f377391273372f</account_key>
<hostid>645502</hostid>
<attached_via_acct_mgr/>
</project>
</acct_mgr_request>
acct_mgr_reply.xml
<?xml version="1.0" encoding="ISO-8859-1" ?>
<acct_mgr_reply>
<name>BOINCstats BAM</name>
<signing_key>
1024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.
</signing_key>
<repeat_sec>3600</repeat_sec>
<message>BAM Host-ID: 508</message>
<account>
<url>http://einstein.phys.uwm.edu/</url>
<url_signature>
33d6a0bf303a453907692a94a64a983c2234e927ec7db84a4118afbe587a4741
e3cea96a7aa91c5e05539e6f5dbd066373a02e15bd79a6614b6bec88f5a40c19
afbb98c27b4aedd08825a93baebb9d156c0e6d34356240941ff1e727e83ec776
e343da0bfd454a3139d3eb2b26944503154ee6883767714957b1e112ec78ccc5
.
</url_signature>
<authenticator>062a2ead7421a3a9606f4d648086ae89</authenticator>
</account>
<account>
<url>http://lhcathome.cern.ch/</url>
<url_signature>
01ca9c082c4bc427f4d183a21a2ac87b51fb2f1f800299ffb227dd4b0c35e418
d7e757a7445943d668dbe9ea8189d8d4ee2d9cda1c6ea3e301f2a5f89cea1384
54f058fa2c629751dad2b581cb2ce62827a62392fb285ece8f89f5d4d3a3a1b6
5a00ecfcb7611ef90869272f48925e6ec28978f42315fddf5a14390fb2d4f62c
.
</url_signature>
<authenticator>4c4592827a25103f270614fef9a5bf3d</authenticator>
</account>
<account>
<url>http://predictor.scripps.edu/</url>
<url_signature>
5001eab2fc7e5ddb7ea8444bd143d5ae62ebe6489d76ce2708ca1eaa1a18b7db
be1925494713b02e1e0dee66281f97c99c9e795b22d6590885d9888a41db6442
937d0707860ef901b8bea08d31ac49e8f8ebc701b851a126cb1a4bfaebfc3899
c0cf59da593e1b0668d4b55336ccf20e31667d6d3972bff101c0c36cce013d57
.
</url_signature>
<authenticator>1ed21c0b1e903bd6459f00c31ffec0f9</authenticator>
</account>
<account>
<url>http://setiathome.berkeley.edu/</url>
<url_signature>
31219828839801e940e29bd4076f4e07291bcb698756627f59a0eed02de7e2cf
86a012c14b324a113c242083cd85fb1406f7189036c9ca7b72e442a593911215
3db7404e2a10954505b4caebcc1b28af2567e76a3ffd4acb5e7b05cfd7e1c614
9c542a7ea605914823f43466fd3084a4a93392a741b803c15ace503bc1922923
.
</url_signature>
<authenticator>fd58e581b1a738be98f377391273372f</authenticator>
</account>
</acct_mgr_reply>
The second node:
acct_mgr_request.xml
<acct_mgr_request>
<name>Moskito</name>
<password_hash>2ff6b9418763b38de623089e9069c3f7</password_hash>
<host_cpid>1b0ac51c1c299f63da2df920db19eeed</host_cpid>
<domain_name>server.linux.home</domain_name>
<client_version>5.4.9</client_version>
<run_mode>auto</run_mode>
<prefs_mod_time>1109080619</prefs_mod_time>
<prefs_source_project>http://einstein.phys.uwm.edu/</prefs_source_project>
<previous_host_cpid>1b0ac51c1c299f63da2df920db19eeed</previous_host_cpid>
<project>
<url>http://einstein.phys.uwm.edu/</url>
<project_name>Einstein@Home</project_name>
<suspended_via_gui>0</suspended_via_gui>
<account_key>062a2ead7421a3a9606f4d648086ae89</account_key>
<hostid>643745</hostid>
<attached_via_acct_mgr/>
</project>
<project>
<url>http://lhcathome.cern.ch/</url>
<project_name>LHC@home</project_name>
<suspended_via_gui>0</suspended_via_gui>
<account_key>4c4592827a25103f270614fef9a5bf3d</account_key>
<hostid>167330</hostid>
<attached_via_acct_mgr/>
</project>
<project>
<url>http://predictor.scripps.edu/</url>
<project_name>Predictor @ Home</project_name>
<suspended_via_gui>0</suspended_via_gui>
<account_key>1ed21c0b1e903bd6459f00c31ffec0f9</account_key>
<hostid>247857</hostid>
<attached_via_acct_mgr/>
</project>
<project>
<url>http://setiathome.berkeley.edu/</url>
<project_name>SETI@home</project_name>
<suspended_via_gui>0</suspended_via_gui>
<account_key>fd58e581b1a738be98f377391273372f</account_key>
<hostid>2421873</hostid>
<attached_via_acct_mgr/>
</project>
</acct_mgr_request>
acct_mgr_reply.xml
<?xml version="1.0" encoding="ISO-8859-1" ?>
<acct_mgr_reply>
<name>BOINCstats BAM</name>
<signing_key>
1024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.
</signing_key>
<repeat_sec>3600</repeat_sec>
<message>BAM Host-ID: 509</message>
<account>
<url>http://einstein.phys.uwm.edu/</url>
<url_signature>
33d6a0bf303a453907692a94a64a983c2234e927ec7db84a4118afbe587a4741
e3cea96a7aa91c5e05539e6f5dbd066373a02e15bd79a6614b6bec88f5a40c19
afbb98c27b4aedd08825a93baebb9d156c0e6d34356240941ff1e727e83ec776
e343da0bfd454a3139d3eb2b26944503154ee6883767714957b1e112ec78ccc5
.
</url_signature>
<authenticator>062a2ead7421a3a9606f4d648086ae89</authenticator>
</account>
<account>
<url>http://lhcathome.cern.ch/</url>
<url_signature>
01ca9c082c4bc427f4d183a21a2ac87b51fb2f1f800299ffb227dd4b0c35e418
d7e757a7445943d668dbe9ea8189d8d4ee2d9cda1c6ea3e301f2a5f89cea1384
54f058fa2c629751dad2b581cb2ce62827a62392fb285ece8f89f5d4d3a3a1b6
5a00ecfcb7611ef90869272f48925e6ec28978f42315fddf5a14390fb2d4f62c
.
</url_signature>
<authenticator>4c4592827a25103f270614fef9a5bf3d</authenticator>
</account>
<account>
<url>http://predictor.scripps.edu/</url>
<url_signature>
5001eab2fc7e5ddb7ea8444bd143d5ae62ebe6489d76ce2708ca1eaa1a18b7db
be1925494713b02e1e0dee66281f97c99c9e795b22d6590885d9888a41db6442
937d0707860ef901b8bea08d31ac49e8f8ebc701b851a126cb1a4bfaebfc3899
c0cf59da593e1b0668d4b55336ccf20e31667d6d3972bff101c0c36cce013d57
.
</url_signature>
<authenticator>1ed21c0b1e903bd6459f00c31ffec0f9</authenticator>
</account>
<account>
<url>http://setiathome.berkeley.edu/</url>
<url_signature>
31219828839801e940e29bd4076f4e07291bcb698756627f59a0eed02de7e2cf
86a012c14b324a113c242083cd85fb1406f7189036c9ca7b72e442a593911215
3db7404e2a10954505b4caebcc1b28af2567e76a3ffd4acb5e7b05cfd7e1c614
9c542a7ea605914823f43466fd3084a4a93392a741b803c15ace503bc1922923
.
</url_signature>
<authenticator>fd58e581b1a738be98f377391273372f</authenticator>
</account>
</acct_mgr_reply>
Thanks for help!
Marcus