I haven’t had a lot of time to follow this topic but a thought occurs;

Notification: hmm, somebody up the call-chain might want to let the user know about this
Warning: err, somebody up there might want to let the user look into this
Halt: ack! help! debug this!

tim
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tim Rowledge; tim at rowledge.org; http://www.rowledge.org/tim
Strange OpCodes: PFM: Pray For Miracle