Hm, I would also prefer to compile from source, but if you need it working immediately or want something to compare to, you could try installing the RPM.

I did a google search for libapreq2 and Request.so, and found the following links -

http://rpm.pbone.net/index.php3/stat/4/idpl/2121371/com/libapreq2-debuginfo-2.06-2.fc4.i386.rpm.html
http://rpmfind.net/linux/RPM/fedora/devel/i386/debug/libapreq2-debuginfo-2.07-0.2.rc4.fc5.i386.html
http://rpm.pbone.net/index.php3/stat/4/idpl/2121347/com/perl-libapreq2-2.06-2.fc4.i386.rpm.html

Since that second link is from Fedora Extras, I'm guessing you may not have that installed. To find out, you can type

rpm -qa | grep libapreq2

You could also post the question to the apache mailing list....