That's weird. I don't use Yaourt, but AFAICT it does build the package for you, so the executable should depend on the correct .so that's present on your system.
The person who provides the pkgbuild for Dolphin (Alucryd) also has a repository where he provides his own daily builds of Dolphin, but last time I tried they were built against his own builds of polarssl, which differed from the builds present in the official repos (not up-to-date and using different compilation options). This caused his Dolphin builds to be incompatible with the polarssl from the official repos, so you had to stick with the polarssl builds from his repos or build the Dolphin package yourself (I don't know why he uses his own polarssl builds, there must be a reason, but Dolphin works just fine with the polarssl from official repos for me).
So, are you sure Yaourt builds the package for you every time, or does it get it from Alucryd's repository instead ? Because that might be the problem.
The person who provides the pkgbuild for Dolphin (Alucryd) also has a repository where he provides his own daily builds of Dolphin, but last time I tried they were built against his own builds of polarssl, which differed from the builds present in the official repos (not up-to-date and using different compilation options). This caused his Dolphin builds to be incompatible with the polarssl from the official repos, so you had to stick with the polarssl builds from his repos or build the Dolphin package yourself (I don't know why he uses his own polarssl builds, there must be a reason, but Dolphin works just fine with the polarssl from official repos for me).
So, are you sure Yaourt builds the package for you every time, or does it get it from Alucryd's repository instead ? Because that might be the problem.
Arch Linux
Core i5 2400
4 GB DDR3
ATi Radeon HD6870
Core i5 2400
4 GB DDR3
ATi Radeon HD6870