I'm one of those who saw different pricing between new and old, and thought I would wait until I was sure my ticket had "stuck" before posting here.
On the new site, I was offered a TATL P fare of $4.2K as compared with a TATL P fare of $3.8K for the identical itinerary on the old site.
Of course, I took the cheaper option.
My biggest problem with the new site is that the Greasemonkey feature which was so useful for finding upgrade and award availability is now unusable because no actual fare classes are shown any longer — or at least, not on the new site that I have been visiting. Any ideas, anyone?
And I too have found that clearing recent history and cache takes me back unerringly to the old site.