On Thu, 23 Mar 2017 08:44:47 +0100 "g.gragnani" <gragn...@dibe.unige.it> wrote: > at my site the math symbol \oiint is no longer displayed when using the > math editor. Is is however inserted in the tex source code, but not > seeing it makes the program prone to typing errors.
This is known bug, which I fixed for LyX 2.4, cf https://www.lyx.org/trac/ticket/8493 Pavel