Plane Sailing
Astral Admin - Mwahahaha!
Why would anyone do such a thing?
Because its easier?
I think the only bit of errata that our group has paid attention to is the "Blade Cascade" errata (because that seemed just overpowered to us in the first place).
There is other stuff that we've house-ruled because we were not happy with it.
The problem with errata is that it isn't in the books, and it can be a pain to cross reference with other stuff (unless you like writing in your books).
Much of the errata is trivial stuff anyway (although I do think that Stealth needed the extra explanation... but in our group we are using stealth pretty simplistically and it is all working OK, so we've not worried about how they changed the definition from the book) or things that seemed so obviously wrong to us that we fixed it ourselves and don't need any 'official' fix (e.g. expertise on double weapons)
To the original question - I don't know of any 'rogue cheese' that has been nerfed by errata (although considering my earlier comments you might rightly wonder the extent to which my advice would be valuable on this particular subject!)
Cheers