This is fixed in lyx 1.5.0-0ubuntu2 in gutsy, I think it can be closed now, since if there will be a backport to feisty it will be fixed there, too.
** Changed in: lyx (Ubuntu) Status: Confirmed => Fix Released -- Math symbols not displayed, substituted with red TeX tags https://bugs.launchpad.net/bugs/68971 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs