not sure i understand, do you mean: you downloaded a file which appeared properly in some software and using your KDE GUI you browse to the file but it shows up with "?" characters rather than the proper characters (as appeared in the P2P software)?
if this is the case, then it seems like the P2P software has the proper encoding and font selected that is able to display the characters properly. you will see "?"s when either the font in use does not support that character or your character encoding is set to something else (likely a smaller character set). if the characters show up incorrectly in your file browser, check the settings for konqueror--i dont use KDE so i dont know which menu, etc. i think i remember there being a main control panel for KDE, and in there would be language or regional settings, that is probably what you will need to look at. i imagine you will either have to enable or install support for hebrew characters or set the encoding to unicode (-8, -16, or -32 shouldnt make a difference).
if it is a display problem in konqueror, i would guess it is an encoding or language support problem, not a font problem. however you can look up different fonts and what characters they support, i forget the link now, but im sure you can find it with some basic google'ing using the appropriate keywords.
let us know if this helped or what youve tried if this didnt help.
Last edited by nadroj; 09-16-2008 at 07:32 PM.