Ah, the stench of Ziploc bags…

It might be because the poly by itself is odor permeable.
You might want to try the laminated bags that have a layer of Mylar in them.
Of course you can't buy them at the grocery store.

Try here:
(I am getting ready to order some myself, not sure which model yet but they have stand up bottoms )

http://www.sorbentsystems.com/standupbags_order.html

When I stick my nose in a box of unused Ziplocks, I can't smell anything besides plastic. I'm guessing then that the nasty smell is from interaction with the food and plastic and not just the plastic of the Ziplocks itself.

Daniel, nice link!

Thanks for the link! I'll definitely try these out.

If you guys figure out which bags to order let me know.
Looking for the clear, boilable (with mylar) stand up style, about 1 quart or so.
They have one style that can be microwaved which I think would probably be the best.
Still groping my way through all those different bags ……

I've not had a problem with food in Ziplock brand bags as long as its not stored for more than a week. Yeah, there's a slight odor/taste, but perfectly acceptable to me. I have had off brands smell/taste MUCH worse.

I picked up some Ziplock Zip-N-Steam bags to try out.
They are microwave safe but there is no info on whether they are chemical safe for boiling. The Ziplock FAQ just says: "Don't use on the stove" which is ambiguous to me.
It may mean there are people out there actually stupid enough to lay the bag directly on the burner … or it may mean don't boil the bags. Not sure.
Apparently there are some freezer bag cooking folks using these, but info is scarce.
They are way lighter than freezer bags and made from a different type of plastic.

And they don't smell …..

I really like the LOKsaks line of bags. Sometimes I can find them at places like MEC. They are reusable and an all around great product. We even used a large one for packing out the unmentionables when we took our little girl on her first wilderness trip when she was 13-months old.

I've never had a problem with ziploc bags. I have recently switched to the cooking bags, similar to the links here, although I have purchased mine from pack it gourmet.

I use the loksak on a few trips. On the latest trip I used them on, my bear bags were all chewed into, and chewed through the bags as well. I'm guessing I got food smells on the outsides of the bag. They seemed to do fine on my other trips, but are a bit expensive.