I was going to add to this post http://wordpress.org/support/topic/plugin-breaks-wp-with-buddypress-install?replies=3 but although I'm seeing the same error message
Call to undefined function get_home_path() in /home/.../public_html/wp-admin/includes/misc.php on line 128
I only see it when I switch to the French side of my site.
On the English side the "home_path" is domain.com, but WPMulti-Lingual appends that with domain.com/fr, which may be causing the issue (two different homes)
I only know enough to get me into trouble, but there also seems to be a disconnect in the errors. The error is saying it's looking for the function in includes/misc.php, but the function is defined in includes/files.php
I recognize it's impossible to make your plugin compatible with every other plugin, but perhaps what I'm seeing might help to triage the issues that they others are having in the other thread.