All reports of package-installs-file-to-usr-x11r6 for the archive. The extended description of this tag is:
Packages using the X Window System should not be configured to install files under the /usr/X11R6/ directory. Debian has switched to the modular X tree which now uses regular FHS paths and all packages should follow.
Programs that use GNU autoconf and automake are usually easily configured at compile time to use /usr/ instead of /usr/X11R6/. Packages that use imake must build-depend on xutils-dev (>= 1:1.0.2-2) for the correct paths.
Refer to Debian Policy Manual section 11.8.7 (Installation directory issues) for details.
This tag has not been emitted in any package tested by Lintian.