The little lightbulb?

Ash1141 Ash1141
What does the little yellow lightbulb mean on a forum post? It will say the number of posts and then have the lightbulb beside it with a + and a different number.
10/11/2011
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Valentinka Valentinka
That's the number of new comments that have been added since the last time you opened that discussion
10/11/2011
Ash1141 Ash1141
Ah...thank you!! That was driving me crazy.
10/12/2011
mikebooks mikebooks
it is a good feature indeed
11/17/2011
lemony lemony
I would have had the same question but didn't think to bother asking. Now I know
01/28/2012
Total posts: 5
Unique posters: 4