startup error message "cannot convert from the charset ..."

[Miha Radej <miha(dot)radej(at)siix(dot)com>]

hi!

i've been playing and compiling with various combinations, omitting 
--enable-debug and/or using --disable-debug with wxwidgets, a fresh 
pgadmin3 checkout and pgadmin3 1.2.2.

in all cases the result is the same: i still get the startup error 
message: http://mcajvar.prkoritu.net/images/pga3_error.png

a friend of mine who tried using my build gets the same error message, 
only with "ISO-8859-1,CP1251" instead of "ISO-8859-2,CP1250" which is 
what i get.

how can i go about finding causes for this error message?

regards,
Miha