The permanent change in brightness as mentioned here by another user should have been finally resolved with the latest firmware from 30.10.2008. (My unit had this too and I was about to return this) The firmware is out english * currently at Philips still as *, but my TV was after the upgrade to this version still German. These strong fluctuations in brightness are finally gone so far. Hurrah. Thus, I can recommend this device like - especially since the price is right. I am very pleased. Thanks to Philips.