clsql:connect causes with-timeout to fail in sbcl

I find that sb-ext:timout no longer works after connecting to a 
database using clsql.  If I run the following test case, the 
first with-timeout works fine, while the one following the 
clsql:connect fails.  Timeouts remain broken, even after 
disconnecting the database.

(asdf:operate 'asdf:load-op 'clsql)

(handler-case
    (sb-ext:with-timeout 1 
      (sleep 2) (format t "interrupt failed~%"))
  (sb-ext:timeout (c) (format t "interrupted ~A~%" c)))

(setf clsql:*default-database*
      (clsql:connect (list nil "andes_test" "root" "sin(0)=0") 
		     :database-type :mysql
		     :pool t :if-exists nil 
		    :make-default nil))
(handler-case
    (sb-ext:with-timeout 1 
      (sleep 2) (format t "interrupt failed~%"))
  (sb-ext:timeout (c) (format t "interrupted ~A~%" c)))

(clsql:disconnect)

I am using clsql-4.3.0 with on a linux machine.  I also see
the same behavior in OS X.
en4052595> sbcl --version
SBCL 1.0.36.31
en4052595> uname -a
Linux en4052595 2.6.18-164.9.1.el5PAE #1 SMP Tue Dec 15 21:41:47 EST 2009 i686 i686 i386 GNU/Linux