I have found out that the query panel seems to have problems with non latin characters when the query is send by POST.
I have attached two query examples:
The first one is send using GET and works fine
The second one is send using POST and gives the following error: " Lexical error at line 9, column 37. Encountered: "\u00a5" (165), after : ""
This is using a UTF-8 based Tomcat connector. If I change to an ISO-based connector, I have the same problem in both cases.
Server: Windows 2008 Server
Client: Mac with FF