APC 3.0.17 - regression?

Hi,

I saw the security notice and updated 3.0.17 release today, so I decided
to upgrade my installation. Now Wordpress (the only PHP application I
have installed to test) works correctly on the first page load, but the
second (presumably cached) load cuts the HTML document half way. This is
in Apache's error log:

zend_mm_heap corrupted
zend_mm_heap corrupted
[Wed Mar 26 15:47:22 2008] [notice] child pid 386 exit signal
Segmentation fault (11)

If I go back to 3.0.16 I have no problems. The precise server setup is:

  Ubuntu 7.10 AMD64
  Apache 2.2.4-3ubuntu0.1
  PHP 5.2.3-1ubuntu6.3

  /etc/php5/conf.d/apc.ini:

  extension=apc.so
  apc.enabled=1
  apc.shm_segments=1
  apc.shm_size=128
  apc.ttl=7200
  apc.user_ttl=7200
  apc.num_files_hint=1024
  apc.mmap_file_mask=/var/cache/apc/apc.XXXXXX
  apc.enable_cli=0

Is this a regression or would you suspect something else in my
installation is at fault? 3.0.16 has worked flawlessly for many months.

Thanks,

-- 
Jay L. T. Cornwall
http://www.jcornwall.me.uk/