| 11:05 am on May 3, 2010 (gmt 0)|
I'd recommend starting at the beginning here: [webmasterworld.com...]
Seems to me you're in the 'lack of long-tail' crowd which will probably go along with any other issues not renewing may have caused... I'm not sure on the forgetting to renew, but it seems there's a definite long-tail shift going on.
| 11:41 am on May 3, 2010 (gmt 0)|
If your site was only offline for 48 hours, it's very unlikely for that to be causing problems 4 weeks later. At least that was historically true. Google seems a bit chaotic right now, but if your site is back up and in the index again, then something else is going on with your current traffic.
| 7:42 am on May 4, 2010 (gmt 0)|
hmm this is the issue... this is the first time I have experience such thing. The only unique thing with the issue is site remain inactive for 48 hours. Other than that even if you renew a domain on the last day, the traffic will back to normal within a week or two, if declined.
| 4:14 pm on May 4, 2010 (gmt 0)|
I've worked with sites that had various registrastion problems and were offline for up to 4 days - and they were back in Google Search within 72 hours after renewing the registration. That's also an experience reported by other members here. So when I say that 4 weeks is out of the box, that's my baseline for the comment.
| 4:31 am on May 5, 2010 (gmt 0)|
hmmm then i suppose this is some penalty cause this much traffic decline is absolutely not a normal situation
| 5:18 am on May 5, 2010 (gmt 0)|
I'd say pin it down a bit more - which keywords and which landing pages are affected.
| 5:38 am on May 5, 2010 (gmt 0)|
Are you sure you have not made any other changes after renewal?
Also, just check if the analytics code is still in place, especially on important landing pages.
Regarding decreased number of indexing in past few weeks; it is common across all sites IMO.