Some other places that hikers got lost in 2008:
-Section D around the infamous frog closure (getting back onto the PCT)
-Forrester Pass, Section H near the beginning of the High Sierra (several went too far to the west/left, picking the wrong pass)
-Crater Lake, Oregon (not lost lost, but the trails are very different now from when the guidebook map was made)
-Pamelia Lake, Oregon (not sure how this happened, but it sounds like literally half the hikers took the wrong trail here)
-Ramona Falls area of Mt. Hood (again, the trails don’t match the map since routings have changed in the past 10 years or so)
-coming out of Goat Rocks, WA (one of the few places where the PCT is NOT the most-travelled trail, so hikers used to just going by feel ended up on a couple different wrong trails)
When a new edition of OR/WA comes out, hopefully the maps will be updated. In the meantime, i would just take note of these places and ask a ranger or trail angel in the town previous to each spot. A local tip or 2 should keep you on track. A current NPS map will make Crater Lake clear. A current Hood NF map will make that one clear. A compass will help make Forrester Pass clear.
The vast majority of the time, the PCT is obvious though.
markv