Web_speed - 9:31 pm on Dec 9, 2011 (gmt 0) [edited by: Web_speed at 9:44 pm (utc) on Dec 9, 2011]
Thes upages seem to move around the globe in waves that take a few days to settle out.
The difference though that they seem to be happening MUCH often since panda (starting around mid August). Something to do with the "freshness" added crap + a all lot of experimenting and fine tuning at the plex at the worst time of the year.
It almost feels like... lets turn down this knob a little to the left, now re-index the entire web... nope wrong, turn it a little more to the right, re-index the entire web... nope wrong...lets change what we look at on page, now re-index the entire web...nope wrong.... you get the drift.
I don't see any logic or rayham beyond websites rank and the constant index moves other then sticking to the good old factors of good original content, good titles and meta tags, reasonable number of on page ads, and links from clean sites.
Trying to fix your sites to fit with the panda "new" algo is like trying to chase the wind. The often crazy ranking move so many are experiencing lately is all to do with a constant (now almost every 3-4 days) full web re-indexing, tweaking and experimenting.
[edited by: Web_speed at 9:44 pm (utc) on Dec 9, 2011]