We're seeing a crash when uploading a large texture with format GL_RGB. It seems to require one of the dimensions to be larger than 5300 pixels or so. This wasn't occurring in the 13.9 drivers. Tested on Windows 8.1.
This code will reproduce the problem. I'm also linking to a complete VS 2012 project that demonstrates the crash.
Link to project: https://dl.dropboxusercontent.com/u/69927239/texsubimage2d_crash.zip
I'm getting a similar crash myself. Large texture, GL_RGB format, but I'm passing the data in via glTexImage2D rather than glTexSubImage2D and it crashes in glDrawArrays when I use the texture. The internal format can be GL_RGB or GL_RGBA at least, and it still crashes, but change to GL_RGBA for the format and it works.
I can confirm that the 13.9 driver works fine. I haven't tested any beta drivers.
I'm using Windows 7 64-bit.