Hello,

We face a strange problem when we try to uncheck the 'open group' state and hit 'save' when we have inserted strange characters in the group desciption / title, such as 'xinès'.
It is tranformed to the code: xinès and on save the following notice appears:

------------
An error has
occured in the application.

This
event has been logged and will be addressed by the maintenance department. We
appreciate your patience.

A potentially dangerous Request.Form value was detected from the client
(ctl00$ctl00$ctl01$ctl00$cp$cp$wpm$gwpctlGroupContainer$ctlGroupContainer$groupEdit$txtDescription="...e
traducción audiovisual ...").

at System.Web.HttpRequest.ValidateString(String value, String collectionKey,
RequestValidationSource requestCollection) at
System.Web.HttpRequest.ValidateHttpValueCollection(HttpValueCollection
collection, RequestValidationSource requestCollection) at
System.Web.HttpRequest.get_HasForm() at System.Web.UI.Page.GetCollectionBasedOnMethod(Boolean
dontReturnNull) at System.Web.UI.Page.DeterminePostBackMode() at
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint,
Boolean includeStagesAfterAsyncPoint)

To continue working with the application please click here
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I cannot understand what might be the problem concerning the encoding. 
We are using the MonoX v4.7.40.3597 [6/12/2012], DB v4.5.3103 

Thank you in advance,
Panos