*Yen Drops To 138.51 Against Pound

*Yen Slips To 104.78 Against U.S. Dollar

Moody's: Australian Banks Face Rising Challenges

*Yen Slides To Near 3-week Low Of 106.53 Against Swiss Franc

Rbi says Accepts All 24 Bids for 23.33 Bln Rupees at Wednesday's 1-Day Reverse Repo Auction