A friend of mine has been using Ubuntu 10.04. Because he has some newer hardware, I recommended that he upgrade from 10.04 to 11.04, which fixes some issues. I'm still using Ubuntu 10.04, and we typically use the screen sharing feature in Empathy to allow me to remotely log into his machine and fix things when needed. Unfortunately, now that he's upgraded, it seems that, when he chats with me using Empathy, it disables the "Share My Desktop" menu item on his end. However, when I use 11.04, the "Share My Desktop" option is enabled, and works as expected. Furthermore, when I'm in 10.04 and he is in 11.04, I can invite him to share my desktop, and this also works as expected. From a user's perspective, then, it seems that the upgrade from Empathy in 10.04 to 11.04 broke backwards compatibility between the screen sharing feature of these two versions of Empathy, such that the newer version cannot invite the older version to share the newer version's desktop.
Is this expected behaviour, or is it a bug? Can anyone recommend a workaround, other than resorting to an alternate desktop sharing client like TeamViewer?
I posted a bug report on this issue here: https://bugs.launchpad.net/ubuntu/+source/empathy/+bug/775682