Proof:
http://forums.bistudio.com/showthread.php?178700-Getting-weird-shadow-glitches
http://cloud-4.steampowered.com/ugc/54358499842831377/F8ADFF276A8B0BAD7CAEAB66FB1D6888BC550947/
(you can see the infantry through the wall and bushes thanks to the underground shadows)
http://cloud-4.steampowered.com/ugc/50981266241884255/8EAACB2D85E6611B37D81C170B8267F9C164AE8E/
(not that bad in this case)
http://cloud-4.steampowered.com/ugc/46478046928621206/89529A7578178EBDD6DDA7484F63D61761F41F67/
(sigh... it's even worse when they're moving)