This error occurrs on release 4.6.1 onwards.
Note: This issue is fixed by default on all VPS3 and new VPS2 servers, resolve-able on VPS1 and old VPS2 (with some updating).
This fix works for Verio VPS2 Servers which are installed with PCRE 6.4 by default (at this time). I see no reason why it should not work for all unix servers (perhaps with directory changes etc).
The fix is to uninstall pcre and install the correct version as follows:
login as root
which will show you the installed packages.
# pkg_delete pcre-6.4 (assuming you see pcre-6.4 as the installed version, change as required)
change to the directory where your ports collection is.
on FreeBSD it is:
so type into your shell prompt:
# cd /ports/devel/pcre-utf8
# make install
# make clean
then restart the apache server...
something like this (this is a VPS2 specific script, yours may be different):