When marking a message as read, Google Reader gives me the message 'Oops...an error occurred. Please try again in a few seconds.' . It occurs both in Firefox & MS Explorer.

Very ennoying, as I rely heavily on this feature to read my threads.

Annyone else has the same problem?

Or it's an April fool... ?
Fucking april fool in this case ;)

Indeed, Tom :(
You experience the same?

I'm getting that too. Can't mark any posts as read.

I have the same problem

The problem started 3 or 4 hours ago for me
And I have 600+ items unread :-P

I've got the same problems too. I can't mark any post as read

Well, I'm happy that I'm not alone :P

My workaround for now:
* Use List View
* Read all mails in a thread
* Us mark all messages as read

That still seems to work...

Same here for me... something in the work?

I've send a message to labs+readergoogle.com . And Google is monitoring this forum from time to time, but of course it's sunday ...

Some threads on the problem are on Google Groups.
E.g.
http://groups.google.com/group/Google-Labs-Reader/browse_frm/thread/b6dc04f9a4cb4fd4

The problem has been solved now for me.
Anybody has seen a reaction from Google?
Or is it the usually solved in silence?

I've been having this problem on and off the last few days, normally resolved after a refresh, but not today.

It's been doing that to me too but it doesn't matter much as I only have 14 feeds.
Read this new joke: http://www.pandia.com/sew/406-googgles.html

No problem anymore, nevertheless I had to check the hundreds "unread" items...

Mihai was there:
http://groups.google.com/group/Google-Labs-Reader/msg/d2a9d2b111cf052a

thx for the message Tom

Adam, I've just got reply from Mihai on that problem:

<<
We've seen a few other reports of the session restore issue, and
should have a fix released soon.

Mihai Parparita
Google Reader Engineer
>>

So good news, I think.
And I must say that Google did great communication in this ... (In contrary to the previous problem I discovered http://blogoscoped.com/forum/ 82535.html#id82535
[remove space for URL])

BTW Mihai, second from left:
http://bp3.blogger.com/_JeezW6hX3tY/RgAhYdNMHmI/AAAAAAAAAYI/dymzZHRMwZQ/s1600-h/team.jpg
Taken from:
http://googlereader.blogspot.com/2007/03/your-growing-google-reader-team.html

(Well someone should edit post above I think :( )