Unable to make update: /libexec/ld-elf.so.1: /lib/libthr.so.2: unsupported file layout

Hi,

I get the following error when running make update in /usr/src.
I tried starting csup alone, but got the same problem. ANy thoughts?

Rgds,

Patrick

hulk# uname -a
FreeBSD hulk.superhero.nl 7.0-CURRENT FreeBSD 7.0-CURRENT #0: Fri May 18
17:10:44 CEST 2007    
admin_at_hulk.superhero.nl:/usr/obj/usr/src/sys/GENERIC  amd64
hulk# pwd
/usr/src
hulk# make update
--------------------------------------------------------------
>>> Running /usr/bin/csup
--------------------------------------------------------------
/libexec/ld-elf.so.1: /lib/libthr.so.2: unsupported file layout
*** Error code 1

Stop in /usr/src.
*** Error code 1

Stop in /usr/src.
hulk#