Operation is not valid due to the current state of the object
Reasons/Solutions:
The case is not general but implies that some events are not triggers (i.e inside of webcomponents and grids).
The symptoms are
- there is no error or
- ocurred an error : "Operation is not valid due to the current state of the object"
This fixes introduced by Ms11-100 temporarily mitigates a potentail Dos Attack. For that reason the number of postbacks are limited.
This value is configurated using MaxHttpCollectionKeys of web.config file.
<add key="aspnet:MaxHttpCollectionKeys" value="XXXX" />
where XXXX is bigger than 500
For more information:
http://stackoverflow.com/questions/8824244/the-url-encoded-form-data-is-not-valid-asp-net
http://kreelbits.blogspot.com/
http://technet.microsoft.com/en-us/security/bulletin/ms11-100