I've also met this ultra-smart actions of aptitude. Finally after a day of cracking my head I've removed everything and built soft from sources. I have no ideas, but if you need it fast, I guess you don't need to waste your time, build it from source. Keeping your server software up-to-date is strongly suggested, you know why. I personally prefer to build all my server software myself.
Also, that pcre 7.7 is old, current version is 8.01. 1.4.23 is old too, it has some critical bugs.
You might want to try backports
and see if it contains newer releases, but if not...