En internet he encontrado lo siguiente acerca de las versiones del firmware por si a alguien le puede interesar.

Each release contains:
- All solutions identified in earlier versions
- Improved connectivity to improve compatibility with other external devices
Q581E_0.64.14.6
- general HDMI improvements
- improvements for MPEG4-sets France(42PFL9742D/19 and 37PFL9642D/19)
Q581E_0.64.14.4
- general HDMI improvements
- solution for SKY HD box picture problems with HDMI in United Kingdom
Q581E_0.59.31.0
- start-up behaviour improved
Q581E_0.59.28.0
- picture improvements for 42PFL9900D and 52PFL9632D
- start-up behaviour improved
Q581E-0.59.23.0
- solved: M6 broadcaster(Luxembourg) could not be captured
Q581E-0.59.21.0
- improved USB performance
- improved channel installation
Q581E-0.59.19.0
- solved: MUX reception Gilford (United Kingdom) not recognized
- solved: teletext occasionally blocked
- stability improvements for MHEG in in United Kingdom
- color correction when switching from DVI to HDMI
- picture improvement when PC is connected to TV with static content.
(Associate or link your external as 'PC' via the menu settings)