Text Encoding for Filename is not uniform in wxMac-2.6.3

[BawaSingh]

 I am using wxMac-2.6.3 on Mac OS 10.3.9 Xcode as IDE and gcc 3.3 as 
compiler. 
I am facing one problem, when my program deals with the file/dir names 
having special characters, some functions like wxFileExists expects the 
filename in Default Mac System Encoding (MacRoman) format while 
wxDirExists demands in UTF8 Decomposed. 
Does it means the implementation is not uniformaly distributed. 

Is this a bug in wxMac-2.6.3 or is there something wrong in my 
wxMac-2.6.3 build. 
My program was doing very well with earlier wxMac-2.5 Library. 
wxMac-2.5 was taking the file/dir names in UTF8 Decomposed throughout. 


Is this issue with wxWidgets-2.6.3..? 



Thanks

Bawa Singh