libc relocation error

Hello, it looks like after running apt-get upgrade on my box, my glibc environment has been broken:

Updated the following:
Get:1 http://http.us.debian.org stable/main libc6-dev 2.3.6.ds1-13etch2 [2717kB]
Get:2 http://http.us.debian.org stable/main libc6 2.3.6.ds1-13etch2
[4699kB]

Get:3 http://http.us.debian.org stable/main lsb-base 3.1-23.2etch1
[16.6kB]

Get:4 http://http.us.debian.org stable/main x11-common 1:7.1.0-19
[338kB]

Get:5 http://http.us.debian.org stable/main debian-archive-keyring 2007.07.31~etch1 [9318B]
Get:6 http://http.us.debian.org stable/main nano 2.0.2-1etch1 [547kB] Get:7 http://http.us.debian.org stable/main locales 2.3.6.ds1-13etch2
[3967kB]

Get:8 http://http.us.debian.org stable/main nfs-common 1:1.0.10-6 +etch.1 [128kB]
Get:9 http://http.us.debian.org stable/main apache2-utils 2.2.3-4 +etch1 [341kB]
Get:10 http://http.us.debian.org stable/main apache2-mpm-prefork 2.2.3-4+etch1 [418kB]
Get:11 http://http.us.debian.org stable/main apache2.2-common 2.2.3-4 +etch1 [962kB]
Get:12 http://http.us.debian.org stable/main tetex-base 3.0.dfsg. 3-5etch1 [22.7MB]
Get:13 http://http.us.debian.org stable/main xlibs-data 1:7.1.0-19
[18.5kB]

dpkg subsequently segfaulted, and I now get the following error when running commands like dpkg, or even 'ls':

ls: relocation error: /lib/libpthread.so.0: symbol __libc_stack_end, version GLIBC_PRIVATE not defined in file ld-linux.so.2 with link time reference

I'm running kenel 2.6.18, on etch.

Any help would be appreciated.

thank you,
-lev

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