I know about page rank and serp index(whom you say serp rank). I think you need to read my post properly.
you are giggling here with false alarm but i am suffering so just wanted to share..if anybody not getting these change..what can anyone do...
No update + or - for any of my sites. Definitely it's not an updated just some minor corrections which these days happens very often.
for me it was PR1 and go down to PR0 But now i check it PR1 something strange i asked someone and tell me it may be related to Panda effect
I would like to know too, because mine was also changed from PR 2 to PR 0!! The articles in my websites were all written by me, except for some pieces of mainstream media news reprinted as it was important for visitors to know. And I tried to post one original article at least a day (though there was a hiatus when I was busy with my work). So, Google counts my site now to be crappy? What the hell.
No changes in PR for my site. But Recently google had some fluctuation in ranking. Because my website was pushed from 170 to 40 rank.
Google has always said you shouldn't focus on PR but getting quality backlinks, PR will come eventually
Generally I have noticed, Google used to lower down/increase a websites internal pages PR's in these minor updates