Comment 26 for bug 1008277

Samuel Mehrbrodt committed a patch related to this issue.
It has been pushed to "libreoffice-4-2":

http://cgit.freedesktop.org/libreoffice/core/commit/?id=d6bc8ed3356d88231cca0306790f300517b7fae2&h=libreoffice-4-2

fdo#50672 Escape underscores in menus for unity

It will be available in LibreOffice 4.2.4.

The patch should be included in the daily builds available at
http://dev-builds.libreoffice.org/daily/ in the next 24-48 hours. More
information about daily builds can be found at:
http://wiki.documentfoundation.org/Testing_Daily_Builds
Affected users are encouraged to test the fix and report feedback.