The beautiful new about dialog does not close with ESC.
IMHO it's a basic bahviour for each dialogue that ESC does close it.
My version is
(split of issue for bug 48659)
Maybe you could place a CancelButton there, and hide it. Its keyboard shoutcut (ESC) might work anyway.
yeah, I was going to suggest the same thing, and that will also address the "AboutDialog::LinkStubCancelHdl" entry at the top of unusedcode,easy
Caolan McNamara committed a patch related to this issue.
It has been pushed to "master":
Resolves: fdo#48723 add a (hidden) CancelButton so ESC closes about dialog
works fine in http://dev-builds.libreoffice.org/daily/Linux-x86_10-Release_Configuration/master/current/master~2012-04-17_13.43.52_LibO-Dev_3.6.0alpha0_Linux_x86_install-deb_en-US.tar.gz