As the bug-database is read-only I file my report to this forum:
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System: Linux 2.4.22-1.2174.nptl (Fedora Core 1)
<br />
Boinc Version: boinc_3.18_i686-pc-linux-gnu<br />
and boinc_3.19_i686-pc-linux-gnu (boinc-cvs-2004-07-07)
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When adding tags and &ltuse_http_auth&gt to "client_state.xml" boinc-client fails.
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$ boinc_3.19_i686-pc-linux-gnu

2004-07-09 09:41:20 [---] Starting BOINC client version 3.19 for i686-pc-linux-gnu

Enter the URL of the project: http://setiathome.berkeley.edu

You should have already registered with the project

and received an account key by email.

Paste the account key here: [--- snip ---]

2004-07-09 09:41:31 [http://setiathome.berkeley.edu/] Project prefs: using your defaults

2004-07-09 09:41:31 [http://setiathome.berkeley.edu/] Host ID not assigned yet

2004-07-09 09:41:31 [---] No general preferences found - using BOINC defaults

2004-07-09 09:41:31 [---] Fewer active results than CPUs; requesting more work

2004-07-09 09:41:31 [---] Fewer active results than CPUs; requesting more work

2004-07-09 09:41:31 [http://setiathome.berkeley.edu/] Requesting 17278 seconds of work

2004-07-09 09:41:31 [http://setiathome.berkeley.edu/] Sending request to scheduler: http://setiboincdata.ssl.berkeley.edu/sah_cgi/cgi

SIGABRT: abort called

Exiting...

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GDB gives following output:
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$ gdb boinc_3.19_i686-pc-linux-gnu

GNU gdb Red Hat Linux (5.3.90-0.20030710.41rh)

Copyright 2003 Free Software Foundation, Inc.

GDB is free software, covered by the GNU General Public License, and you are

welcome to change it and/or distribute copies of it under certain conditions.

Type "show copying" to see the conditions.

There is absolutely no warranty for GDB. Type "show warranty" for details.

This GDB was configured as "i386-redhat-linux-gnu"...Using host libthread_db library "/lib/tls/libthread_db.so.1".
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(gdb) run

Starting program: /home/spalm0/opt/bin/boinc_3.19_i686-pc-linux-gnu

[...]

Program received signal SIGSEGV, Segmentation fault.

NET_XFER_SET::insert(NET_XFER*) (this=0x0, nxp=0x96280a0) at stl_vector.h:597

597 if (_M_finish != _M_end_of_storage)