If you set debug to 2 in /application/config/config.php do you get more error information?

If set to debug 2 I get the following error:

Fatal error: Call to undefined method HttpRequest::GetRequestArguments() in /home/terrytip/public_html/Survey/application/helpers/common_helper.php on line 5641

Update to the latest build (121106) manually and make sure you upload and replace all files. Please report if that fixed your issue.

I've manually updated the files, I'm still getting the same error:

Fatal error: Call to undefined method HttpRequest::GetRequestArguments() in /home/terrytip/public_html/Survey/application/helpers/common_helper.php on line 5641

Sorry, I cannot reproduce this, at all - works like a charm here :-/

Would it be possible if given direct ftp access to the directory (along with database information) you would be able to attempt to either install correctly, or reproduce the issue?

We require this to work ASAP, so any help would be brilliant.

Are you sure about the error? It should have the class httpRequest, starting with a lower case. Try changing line 5635 to Yii::import('application.libraries.admin.http.httpRequest', true); (so adding ,true)

EDIT: in application/helpers/common_helper.php that is

Please send the FTP access data to (email address removed) and I will have a look today. In return a donation would be nice.

Mdekker - I changed the line as advised, and now this error is shown:

Fatal error: Call to undefined method HttpRequest::GetRequestArguments() in /home/terrytip/public_html/Survey/application/helpers/common_helper.php on line 5641

Schmitz - I've emailed your email, and I'd be happy to donate if this works.

Fix committed to master branch: http://bugs.limesurvey.org/plugin.php?page=Source/view&id=10238

The problem is caused by a PECL extension (http://www.php.net/manual/en/http.install.php ) installed on your server which is usually not installed and name-clashing with one of LimeSurvey classes.
I patched the installation on your server so you can use that one by copying the files over to your live installation. It will be fixed in general in the next version.

New 2.00+ build released

Fix committed to 2.1 branch: http://bugs.limesurvey.org/plugin.php?page=Source/view&id=10301