First, hello and welcome to the forum, nice to see a new face.
Probably the best place to report a bug would be in the bugtracker on sourceforge, for details I'd check the link from here on what to include in the report:
http://ufoai.ninex.info/forum/index.php?topic=3105.0Yeah, I noticed myself soon after playing 20247 that it has some issues - I'm actually working on packaging a new installer today, a number of changes have been made since the last build, some that fix many of these issues while other bugs have been created. Right now I've got a snapshot of the SVN that doesn't look too buggy, although I'd like to test it a little more before uploading it.
It seems the interception / air combat is being re-vamped and re-developed as we speak, although so far in a quick test it seems to work.
I also have to finish a scan before creating a new link, as my AV is complaining and I want to upload something clean - then again, it complains about little trivial things (such as cookies) as well as serious stuff.
Stay tuned.