For about 6-9 months in 2006 We had a series of Dell Optiplex GX 270s that had a remarkable failure rate - close to 60% of our systems failed. We knew that Dell must have been having a tough time, when the FIRST question they asked on a support call was whether we saw any "Bulging Capacitors on the Motherboard" - I mean, not "Have you Tried Rebooting", or, "Have you tried powering down for 90 seconds", but "Do you have bulging capacitors."
I'll say this for Dell though - they fixed every last one of those systems within 4 hours of our call.
I have to wonder whether Large Manufacturing organizations are aware that there is a good chance that going with subpar capacitor manufactures will cost them, but do so anyways because of the amount of money they save.