On pg. 45 of the core rules it states that all characters, except dwarves, have a 1 in 6 (16 2/3%) chance of finding traps. On pg. 13 it states that a 1st-level thief has but a 14% chance of finding traps, which jumps to merely 17% at 2nd level.
Has anyone else successfully handled this discreapancy? It's been suggested that a thief could try twice: once as a Joe Adventurer, and then again as a thief if unsuccessful the first time. I've seen done and be more inclined to give thieves a 5% bonus to this ability. Alternately, Joe Adventurer could be given a 1 in 8 (12 1/2%) chance, which may not sit well with legions of Joe Adventurers.