If dev-libs/libofx is not installed, the "ofx" USE flag for app-office/kmymoney2 has no effect. Shouldn't this trigger a dependency?
<snip> IUSE="crypt ofx" DEPEND="dev-libs/libxml2 ofx? ( >=dev-libs/libofx-0.7 )" </snip>
Quick change of platform in bugzilla. Sorry about the email.