Solution : https://service.sap.com/sap/support/notes/633813 (SAP Service marketplace login required)
Key words : 
symptom b2b/b2c tile sets, run time error object error, leave parameter mimes, deployment parameter mimes, object expected, mimes reason, style sheets, solution repeat, affected application, deployment
Related Notes : 
       
| 622140 | ISAWAC40SP01: Installing Channel Management | 
| 620884 | ISAWAC40SP01: Upgrade Internet Sales | 
| 620715 | ISAWAC40: Installing Internet Sales R/3-Edition |