Core profile vs version string? Only getting GLSL 1.3/OGL 3.0 in mesa 10.0.1

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In theory, mesa 10.0.1 should support OpenGL 3.3 but currently I'm only getting 3.0 support.

glxinfo gives some confusing results...

[pdel@architect build]$ glxinfo | grep -i opengl
OpenGL vendor string: Intel Open Source Technology Center
OpenGL renderer string: Mesa DRI Intel(R) Ivybridge Mobile 
OpenGL core profile version string: 3.3 (Core Profile) Mesa 10.0.1
OpenGL core profile shading language version string: 3.30
OpenGL core profile context flags: (none)
OpenGL core profile profile mask: core profile
OpenGL core profile extensions:
OpenGL version string: 3.0 Mesa 10.0.1
OpenGL shading language version string: 1.30
OpenGL context flags: (none)
OpenGL extensions:

(currently running Intel HD Graphics 4000)

Can anyone explain the difference between the "core profile version string" and the "version string" and why they're different?

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