It's no bug. He took a unit that could not swim and ordered it into the water. That's what happens when you order a heavily armored unit to try and swim. Can't blame CA for his tactical failure.
Exactly. Hold Position comes to mind.

About the flash of light, that's usually an ATI card problem due to missing gloss textures. Havent had a problem with the full version though, and i have reflections/glints on my radeon 9700 Pro.