-One of the main new features in version 1.5.0 is Unicode. As part of the
-transition, lyx2lyx (the scripts used for converting back and forth between
-different versions of the lyx files) converts old .lyx files, which may use
-a number of different encodings, to UTF-8. This conversion depends on
-correctly identifying the language of the text. There were previously some
-edge-cases (insets embedded in different-language text type scenarios) in
-which the language was incorrectly identified, which caused some text to
-appear incorrectly after having upgraded from older versions. This has now been
-fixed. Unfortunately, however, the fix cannot be applied to files which have
-already been converted past format 249. So if you have already converted
-your old files (using a development version or release candidate), this fix
-won't help, unless you still have the originals lying around (and haven't
-yet made too many changes to the newer versions ;) ).
-
-Generally, it is probably wise to keep a backup of the old version of your
-files, at least until you are sure that the upgrade went smoothly (which it
-almost always will).
-
-- RTL and keymaps
-
-Currently there is a bug where you can't use two non-RTL language keymaps if
-the RTL preference is set (which is now the default). If you need to use two
-non-RTL keymaps, for now you should just turn off the RTL preference (Tools ->
-Preferences... -> Language settings -> Language, uncheck "Right-to-left
-language support").
-
-We hope to offer more comprehensive support for multiple keymaps in the future,
-which will solve this bug, as well as allow more than just two keymaps. If you
-have any input on this issue, please chime in on the developers mailing list,
-or add your comments to http://bugzilla.lyx.org/show_bug.cgi?id=4051.