I presume it is like with most things, that openSUSE has its ways of organising the library files and other Linux distroes may have other ways.

Audacity and LADSPA works fine for me, but I only use either the Packman built or the one from -oss; there was, and is for some other software packages, some issues with paths for 64bit environment versions but Audacity (from either of those repoes) should work fine now.