WinRAR  3.91 Beta 2
1. WinRAR might crash when testing corrupt CAB files.
2. Beta 1 crashed on some of TAR.BZ2 archives.
3. Total progress bar could be displayed incorrectly in "Convert archives" command in beta 1.
4. SFX archives set the wrong value to "sfxcmd" environment variabe if user account control prompt was displayed when unpacking.