OS v5.0.0.314
OS v4.6.1.456 (Problem found in both OS)

Problem found (Observations, but ultimately an assumption.)
When receiving:
BBM
Email

No third party LED applications installed.

After everything/anything received is opened the LED stays on, for up to 15 minutes/or until something else is received (granted receiving something doesn't always turn it off.)

Was wondering if anyone has run into this problem, I've had this problem for a while, and it only show's up about once I week.
I can only assume it is the OS lagging, and there's a Delay of it remembering to shut it off.

I'm running 5.0.0.314 and noticed this same issue..just scroll up to the last received message and hit "r" to reply to the message (even if you aren't going to reply) and it should disable the LED..it does for me anyhow..

I'll give that a try.
Not really a major problem, but does get a tad annoying looking at the phone and thinking you have something.