I signed up for an SF account; I'll start making bug reports there.
Very good.
But please do not forget to include the version number tested & detailed descriptions how to exactly reproduce the error...
It depends on the error, but sometimes it is useful also to append the ufoconsole.log and/or savegames if the bug is campaign-related.
Please have a look at other bugreports, especially Edi's, to see how to produce useful tickets on sourceforge.
Thanks in advance for helping.