I have used your file to /usr/share/locales/ru/xdelta_guirodin.s wrote:Same with version 0.5. Here is my translation. You can try it by yourself. It has something to do with UTF-8. Console messages were interesting.
-t12s from woof : did not translate, used UNDO button
-t12s v 0.5 : everything OK
-t12s from woof again: everything OK
Really strange
What are your console messages?