As a fellow owner I have came to the same conclusion with the fluctuating brightness niggle [I just turn down the brightness], and would add that there is a slim chance that you will find an engineer who knows any more than the bare minimum, about these "magnificent" sets. It has taken 3 months for me to get a component input problem resolved on my set, I blame the basic design of the TV rather than the engineers who eventually fixed it. Bottom line is I will never buy another RPTV and it will be my last Toshiba TV product. Due to pathetic aftersales service from Toshiba, and the inevitable "washing of hands once sold" attitude of the shop I bought it from. In fact while I'm in mid-rant mode, reviewers should take more care when recommending these sets. Before I bought mine, not one review mentioned the brightness, convergence, build quality or poor vertical viewing angles of this product line. They all seemed far to pre-occupied with an improved picture over previous generation RPTV's and dare I say the larger size compared against limited CRT sets, rather than giving consideration to purists like myself who would inevitably tire of the mounting number of "niggly" problems associated with them.