libxfcegui4 from 4.4.3 has soname libxfcegui4.so.4.2.6 libxfcegui4 from 4.5.99.1 has soname libxfcegui4.so.4.2.5
Yes, it should be libxfcegui4.so.4.3.0 because there's been several API additions and deprecations. i.e.: -m4_define([libxfcegui4_verinfo], [6:5:2]) +m4_define([libxfcegui4_verinfo], [7:0:3]) Committed revision 29406. Thanks for reporting this.