I first saw the cap problem on a "quality" IBM desktop. I've also seen it on high end Dell servers.
(plus, of course, the run-of-the-mill machines).
They're common in monitors (esp LCD's as those tend to bottom feed in terms of quality) as well as TV's and assorted power supplies.
But, all electrolytics will eventually fail given enough hours at a high enough temperature. Be especially wary of those that are in "condensed" packages. I.e., if you're having problems finding the same value/voltage device in a particular physical package size, chances are the (original) device *will* be a problem!
I've also encountered under-rated caps in power supplies in cheap consumer kit (like the $19 DVD players), professional grade organs (think "rock bands"), etc.
[One advantage to volunteering at a recycling center is you get to see how devices fail and "bad design choices" -- important if you're interested in making quality products in big quantities! As well as which products to PERSONALLY avoid!]