On the level with map errors....and Knobs?

Sean & Brendon,
The County Highpointers Assn website www.cohp.org has good information on various hand held levels that can be used to compare relative summit heights. Also, there is a good discussion on the use of levels by Bob Martin with regard to the identity of Montezuma County, Colorado, highpoint-Hesperus Mountain vs Lavender Peak.
The largest elevation discrepency I've seen in Idaho relates to Alcyone Peak in the southern Pioneer Mtns. The 1960 Muldoon Canyon 15' quad shows a spot elevation of 11258'. The 1991 Smiley Mountain 7.5' quad shows no elevation and a highest enclosed contour of 11200'. My own hunch is that the newer map is missing a contour. Brendon, maybe you could train your mapping software on that one , too.
The largest single mapping error I've come across on a current Idaho map is on the 1991 Copper Basin Knob 7.5' sheet. Copper Basin Knob el 10784' is mapped with two summit knobs when there should only be one. Incidentally, this is a short, fun peak to do. Just go up Charcoal Creek. This is a north approach. Ascend the west ridge, then pick your way up good holds on the dacite knob. Copper Basin Knob offers an engaging 360 view and is seldom visited. Has anyone else found mapping errors?