I’ve seen several announcements regarding the delay of FF 2.0, but nothing about a spell-checker causing the problems.
Announcements such as this:
http://www.betanews.com/article/Mozilla_Delays_Firefox_20_Until_Oct/1155749497
When they’ve worked out the bugs, and they go with a final, I for one, will be delighted to upgrade.
Edit:
If anyone’s interested, you can keep track of what they’re doing here:
http://wiki.mozilla.org/Firefox2/StatusMeetings/2006-08-15