[xwiki-users] Attachment file name truncation

Hello, XWiki guys! i saw this topic: http://www.xwiki.org/xwiki/bin/view/FAQ/Whenuploadtheaccessoriesatthexwiki13 versionallChinesewillbedeletedinfilename and i have the same problem, but with russian characters. When i'm adding the file with name, like "russian_word123.txt" - it is adds like "123.txt". All russian symbols are truncated. With english and numbers - all fine. Please help asap... All encoding are sets t oUTF-8 and hole Xwiki don't have problem with russian characters, except attachment thing. I'm really need russian characters in file names, how I can get this, or disable the truncation function??? BTW - my environment are: XWiki Enterprise 2.1.25683 Oracle 10gR2 Thanks!