What I can't determine is if the corrections to SRD ogc is still ogc. My gut tells me it's not an issue because they're "corrections"... but I've been looking into this to try to find a definitive answer.
edit: WotC's OGL FAQ asks/answers the questionemphasis mine). I don't know if that answers the question, but it seems on the right track.
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My own understanding is that the corrections to the Player's Handbook, Dungeon Master's Guide, and Monster Manual are derived from the Player's Handbook, Dungeon Master's Guide and Monster Manual.
The Player's Handbook, Dungeon Master's Guide, and Monster Manual are definitely not OGL and WotC's right to use them is definitely not derived from the OGL. The fact that the copyright notice is 'naked', rather than with the OGL notice that would be required if the corrections were OGL, underlines this point.
I am for leaving the corrections out.