Hi,
I click the file (shown below),
https://dl.dropboxusercontent.com/u/40211031/tt22.png
within Sharepoint 2010, but I get the problem (shown below). why?
https://dl.dropboxusercontent.com/u/40211031/tt23.png
is it just with one file or many ? did you try to look at the uls Logs (With verbose enabled) ?
The error is: Unable to process the request. Wait a few minutes and try perform this operation again.
And such problem does persist there and never disappears.
can you just paste the error message here as i can not access the link ?