Hi Brian,
Found another example of air-to-ground friendly fire: Verviers, Belgium, was on 11 October 1944 bombed by P-38s, killing 16 Belgian civilians and 4 GI's.
Source:
http://books.google.fr/books?id=f3RP...&lr=#PPA173,M1
Edited:
And another some days before on the other side of the world:
On 7 October 1944, two Indian M.L. (1118 and 1119) were sunk by friendly aircraft in "Indian waters" (or off Burma?) and 9 men were killed. On the same day several crew of other ML were also lost, maybe in the same attack
Source:
http://www.hmsmedusa.org.uk/HDML_Roll_of_honour.html
http://www.hmsmedusa.org.uk/HDML_Story_1944.html
http://www.naval-history.net/xDKCas1944-10OCT.htm