I get the following message ev erytime I try to use desktop! any ideas?

message - newParent has no properties
fileName - http://localhost:7633/zimbra/js/zimb...v=070621192601
lineNumber - 992
stack - (undefined)@http://localhost:7633/zimbra/js/zimbraMail/share/model/ZmOrganizer.js?v=070621192601:992
([object Object])@http://localhost:7633/zimbra/js/zimbraMail/share/model/ZmFolder.js?v=070621192601:296
([object Object])@http://localhost:7633/zimbra/js/zimbraMail/core/ZmRequestMgr.js?v=070621192601:461
([object Object])@http://localhost:7633/zimbra/js/zimbraMail/core/ZmRequestMgr.js?v=070621192601:362
([object Object])@http://localhost:7633/zimbra/js/zimbraMail/core/ZmRequestMgr.js?v=070621192601:288
([object Object],[object Object])@http://localhost:7633/zimbra/js/zimbraMail/core/ZmRequestMgr.js?v=070621192601:219
apply([object Object],[object Array])@:0
([object Object])@http://localhost:7633/zimbra/js/Boot_all.js?v=070621192601:351
([object Object],[object Object])@http://localhost:7633/zimbra/js/zimbra/csfe/ZmCsfeCommand.js?v=070621192601:357
apply([object Object],[object Array])@:0
([object Object])@http://localhost:7633/zimbra/js/Boot_all.js?v=070621192601:351
([object Object],[object Object])@http://localhost:7633/zimbra/js/ajax/net/AjxRpcRequest.js?v=070621192601:207
()@http://localhost:7633/zimbra/js/ajax/net/AjxRpcRequest.js?v=070621192601:130
@:0

name - TypeError