Yup, that's the one story I was talking about. Are there others? You said you've heard of several.
Yes, there was the 2007 trip that Luminous Landscape members took to Antarctica in 2007.
Antartica 2007 – What Worked? What Didn't
As Reichmann wrote,"About 85% of the trip's members were shooting with Canon gear, mostly 1Ds MKII. There were a couple of 1D MKII and 5D's, with several people having Rebel XT and XTi bodies as backups.
There were quite a few camera failures, most of them occasioned by our shooting in rain on the first day ashore in The Falklands. The rain was not heavy more a persistent drizzle than a heavy rain, but it took its toll. In all, 90 minutes of wet shooting produced six 1Ds MKII cameras which stopped working for one reason or another. Three of them recovered after a night of drying out. Three remained hors de combat for the rest of the trip."
"Three Canon 5D's died that day, with one subsequent recovery. Two Rebel XTi's lost their rear LCD's, though otherwise continued to work (which is a real hassle, because though one can keep shooting, there's no way to change any settings, or at least to know what the changes are)."
"We also lost two video cameras, one with a dead sound board and the other a total cardiac arrest. Several lenses bit the dust during the trip, including two Canon 70-210mm f/2.8L IS, and a Canon 28-135mm."
photo-not shown here
"There were 5 Nikon users on the trip, with various bodies mostly D200's. There were no reports of any Nikon problems or failures."
"There were four H series Hasselblad users onboard, including me. Three of us used H1 and H2 bodies with Phase One P45 backs, while one person used an H3D with its included 39MP back. There were no camera failures or back problems, but one person's 210mm Hasselblad lens bit the dust early in the trip, for no apparent reason."