i had the same problems

here is what i did (i write this from my mind - so i hope its correct ;-):

- become root
- add to the file "/etc/ld.so.conf" the line "/var/lib/install/usr/lib/" and save the file. so the system looks for the libs also in this path.

i think thats it....

i tried the same as you with gpesyncd, but i hadn't much success :-(
at first, all worked fine - i could sync my todo list, my calendar and my addressbook, but only one time. the other syncs failed...

i read, that the developers are still working on it... (thank you to the people who do this work...)

but if you have more luck - please tell me.

so good luck