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The only suggestion I have ... get a copy of Volume Control + (I use Volume Control + Pro) and see how the various volume levels are set. You might be surprised.
... Thom
Did you do a Factory Data Reset after upgrading to ICS?
... Thom

That should not have been needed. It sort of sounds like you have a BAD app installed that is acting up.
A major system update is bound to run into a problem or two. It should have been cleared for you with the Factory Data Reset.
Perhaps your backup/restore is restoring a problem back onto your clean slate?
... Thom
