I have the same issue.
I imported the 1099-B from ETrade. All of the transactions with code E (basis not reported to IRS) have the cost basis missing, and TurboTax freezes in the final review.
I just wasted an hour with support who had me clear cookies, etc, insisted this is not a bug. Too bad I am only seeing this thread and references to the other threads now... This is clearly a bug, and the idiots at tech support are successfully ignoring it. That guy was even saying "I have 13 years experience and have never seen anything like this, so it can't possibly be a bug". Duh... Maybe you should search the forums...
