Sony will release firmware 1.81 for the Sony PS3 today.

Sony just released the firmware 1.80 3 weeks ago. Yesterday Sony posted on their brand new playstation blog that they going to release a minor firmware update today.

The update will fix a few small issues users have reported to Sony.
The 1.81 will fix for instance that the PS3 switches from RGB Full to Limited by itself.
The other fixes related to PS2 games.
The update is now available in Japan, and will later roll out in the US.
Via the Sony Playstation blog.