I'd like to try this once more without it getting buried or expanded into other issues, please. As it's written, the America/Los_Angeles comment in northamerica v8.54 in tzdata release 2012c does not make sense. The simple solution is to remove 7 characters from line 395: < northamerica

northamerica.new

395c395 < # Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties, ---

# Idaho, Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties,

Alternatively, more accuracy could be provided by the following changes: < northamerica

northamerica.new

395,397c395,398 < # Idaho, Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties, < # and the northern three-quarters of Idaho county), < # most of Nevada, most of Oregon, and Washington ---

# Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties, # the towns of Burgdorf and Warren, and the part of Idaho county # lying north of the Salmon River), Nevada (except for West Wendover) # Oregon (except for part of Malheur County), and Washington

AFAIK, this description is completely accurate (though it doesn't reflect unofficial observances in Nevada, which I assume wouldn't be appropriate here).