Yep, I'm a new OM fan too.
I've personally fixed OM4 jams in two cameras this month, both cameras bought for cheap due to the jams.
Fixing them is simple.
I posted the method on the web:
I'm wary of the other issues mentioned on the web and haven't run into them, and so far, the OM4 and OM4ti are working fine. Great glass too.