The Linuxconf package now provides a pseudo feature called LINUXCONFAPIREVxx where xx is the module API revision number. The current number is 13 and is defined in misc/module.h.
This revision number exists for a long time, but now is enforced at the package (RPM for now) level. This means that new modules built with linuxconf-devel 1.15 will require this LINUXCONFAPIREV13 capability (so will only install with Linuxconf 1.15 or better).
Note that the binary compatibility for module (revision 13) has not changed for a while, so you can upgrade to Linuxconf 1.15 and you won't get problem.
This new strategy will allow you to spot at Linuxconf upgrade time which other packages (other Linuxconf modules) have to be upgraded.
The error reported by the modules (dynamic linker stuff) were too wide and Linuxconf text mode UI was not able to cope with that correctly.