Hi Jfs, it's this bug described here:
http://moi3d.com/forum/index.php?webtag=MOI&msg=10981.2

Until the next beta release where it will be fixed, you can fix it by editing testA4.svg in a text editor and replace the commas in the viewBox="0 0 841,8898 595,2756" on the 2nd line of the file with periods, like this: viewBox="0 0 841.8898 595.2756" . It should then import into MoI ok.

Thanks for reporting it, - Michael