From the fact that "also cannot open the file with Winzip or Winrar" this implies that the file is damaged.
You have not told us anything about the origin or transportation of these files. Can you tell us that?
Can you expand on the background to this issue?
Also, 0.86.0 is the current version, but I'll be the first to admit that upgrading is unlikely to solve this problem :-)
If you are FTPing the files, maybe ascii translation is occurring sometimes.