tedster - 4:58 pm on Dec 23, 2011 (gmt 0)

It is ranking for my brand keyword and its a parked/landing page.

That's very interesting, considering this report on November from Google's official Inside Search blog:

New "parked domain" classifier: This is a new algorithm for automatically detecting parked domains. Parked domains are placeholder sites that are seldom useful and often filled with ads. They typically don't have valuable content for our users, so in most cases we prefer not to show them. [insidesearch.blogspot.com...]

Maybe it's a further attempt to fine-tune the classifier and you're seeing the "float to the top and then vanish" style of machine learning that others have observed at times.