I've installed the whole kde-4.3.0 but only one package fails on compile: kopete. Will attach the output
Created attachment 201343 [details] Kopete 4.3.0 compile output
These are the enabled USE flags: addbookmarks autoreplace contactnotes handbook highlight history jabber msn nowlistening pipes privacy ssl statistics - texteffect translator urlpicpreview winpopup yahoo
Ah...if it enabled msn flag there should be updated net-libs/libmsn to 4.0_beta5 :) [FIXED]