Solution : https://service.sap.com/sap/support/notes/573373 (SAP Service marketplace login required)
Key words : 
0b front-end patch 06, 0b front end, front-end patch, manually modified urls, bex query designer, bw queries saved, bex browser, copied queries, bw objects, bw workbooks
Related Notes : 
       
| 559046 | BW 3.0B Front-End Patch 06 | 
| 197460 | BW Frontend Checktool sapbexc.xla |