I'll say.
Ah, that'll be helpful to know, especially for stages and such.
Ok, the flag is located in the material references.
USetting is currently layerId1, VSetting is currently layerId2.
0 = Clamp, 1 = Repeat, and 2 = Mirror (Although I haven't seen mirror used yet).
Clamp is the default, so it will stretch the texture to fit.
Repeat is used to actually repeat the texture, or allow the UV coords to be greater than 1 or less than 0 (I checked the UV coord max and min for textures that used this setting, and they were indeed > 1 & < 0).
Everything seems to be matching up correctly... I need to test this out now!

Also, the material texture matrices seem to be not XYZAB (like Kryal thought), but instead control the clamps:
X = U Max
Y = V Max
Z = Angle (?)
A = U Min
B = V Min