Solution : https://service.sap.com/sap/support/notes/556854 (SAP Service marketplace login required)
Key words : 
goto -> http server cache -> invalidate -> globally, advance source code corrections, advance source code correction, symptom bw web applications, solution import support package 6, http server cache, web application server, bw web applications, goto -> icm monitor, http mime services
Related Notes : 
       
| 561792 | Client-sided caching of image/gif files | 
| 560980 | Compressed transfer of MIMEs with Netscape Navigator | 
| 550669 | Compressed transfer of BW Web Applications |