Question: image persistence
I have had my 24" Intel iMac since like May of this past year. I have had no hardware issues with it at all until now. Just this week though i am noticing image persistence on the screen. I have read all about this subject and i know that it's usually not permanent, and i know how to get rid of it with the white images or the screen-savers or whatever.
My concern is, this didn't start happening until JUST this week. Not once before. I have changed nothing about my iMac usage since i bought it. I have always kept the screen on the absolute lowest brightness, i have my screen-saver set to kick in after 20-ish minutes and the display set to turn off after about 30. I have a full-time job, i go on frequent trips away from home, and nobody else uses the machine but me, so it's not like it's being used all day and all night either.
8 months i've been leaving Firefox and Adium windows up, sometimes for hours, doing whatever, never had a single shadow. But all of a sudden i am seeing this persistence thing where for example keeping my browser window in one place for a few hours gives me vertical bars where the window edge used to be. Running LCD Scrub for a few hours makes the original shadows go away, but they just come back somewhere else later.
It is easy enough to just keep using the screen-savers or whatever to get rid of them, but obviously they will come back, and my concern is, is this just going to keep getting WORSE? Am i eventually going to end up having to completely change my usage habits (like having to turn my display off every hour or two, or running LCD Scrub every night) to get around this problem? Is this the intended behaviour of these displays?
iMac Intel, Mac OS X (10.5.6)