Just three months after its warranty expired, my *ist-DS after 5,500
shots has gotten very flakey.  The "e-dial" thumbwheel on the camera
back, so important in making adjustments, has become extremely
unreliable... skipping settings, etc.  Cameras have become too reliant on
little electric switches... we've all had cheap radios whose rotary
volume control becomes noisy and "scratchy." Sometimes a squirt of
contact cleaner solves the problem, but I wouldn't try that on an
expensive DSLR.

To add to my misery, two recent autofocus lens purchases (the FA 50mm 1.4
prime and a DA 16~45mm zoom) are often not focusing where I tell them to.  
Problem must be a drifting auto-focus sensor. I did a portrait shoot with
the FA 1.4 on autofocus today, with barely usable results. As a check, I
ran some tests with my M-mount 50mm 1.7 wide open... focus was exactly on
target.

Fragile, faulty electronics makes one miss the old days when fully-manual
cameras needed no battery, and the only electrical contact was the flash
jack.  A time when a camera's reliable life could be measured in decades.  
No, I'm not longing to get back into the darkroom, just wish these new
gadgets were more robust.