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This isn't the face of someone worried about her employment status!

Selma Blair took her adorable son Arthur out for a stroll in L.A. this morning, and when photographers asked her about the rumors Charlie Sheen is demanding producers fire her from Anger Management, she said, "I don't know anything."

That's not exactly a denial there's a major feud brewing between the co-stars!

According to reports, the Hollywood bad boy caught wind that the brunette beauty was trashing his work ethic on-set, which prompted him to give producers the ultimatum that either she get fired, or he will walk!

FX network execs are said to be in talks about how to handle the difficult situation.

Talk about a battle of egos!