All reports of udeb-postinst-must-not-call-ldconfig for the archive. The extended description of this tag is:
The udeb invokes ldconfig on install, which is an error in udebs.
ldconfig is not available and not needed in debian-installer.
Note that this tag may (despite what the name suggests) be issued if the udeb uses a dpkg trigger to invoke ldconfig.
This tag has not been emitted in any package tested by Lintian.