eCPM decrease suddenly

huh?

[solinent]

Ok, suddenly my eCPM decreased about $4 (I'm not sure if I'm allowed to post the actual amount). I haven't made any changes, and the ads that are appearing look the same. My page impresions are going down slightly (due to something unavoidable, but I did something to help), but I'm not sure what the cause is.

Also, my link units are not showing anything ("View ads about"), even though the actual adsense banner is.

I don't think I can post a link. What can I do?

[solinent]

Sorry, forgot one thing:

Also, the page impressions for adsense are different from my logs. (by about 2x). I do have non-adsense pages, but even if I account for this, it still doesn't add up (off by about 1.5x)

[ann]

Sounds like the twister is touching down.

[webmasterworld.com...]

[solinent]

No! The Twister!

But it's started before that. Is anyone else seeing changes after it?