strange concatenation behavior with some currency symbols

Hi,

i almost finish my currency format displaying function, however i'm 
facing a strange displaying format behavior.

here is an example in UTF-8:
1234.56 د.ج / 1234.56 DZD <-- that's wrong it should be 1234.56 د.ج
/ 1234.56 DZD

1234.56 € / 1234.56 EUR <-- that's OK
1234.56 ¥ / 1234.56 JPY <-- that's OK
1234.56 ман / 1234.56 AZN <-- That's OK
1234.56 ب.د / 1234.56 BHD <-- that's wrong
it should be 1234.56 / 1234.56 BHD

it's like for all "arabic" symbol there's a problem.
any idea how could i solved it ?
thx