Error in Amethyst upgrade:Upgrade file incomplete/corrupted

[Belinda Frick]

If you upload any file, then go to logs to view it and click on refresh,
you will get this error since the file you selected to upload is not
available at the time you click on refresh. This is not a fault.

See below detailed sample:

Finished /tmp/amtupgrade/admin_upgrade.tar.gz
[2008-01-30 16:04:42] Version [1.5.12.1]******** UPGRADE EXECUTION STOPS HERE *************
[2008-01-30 16:05:13] Version [1.5.12.1]******** UPGRADE EXECUTION STARTS HERE *************
Installing /tmp/amtupgrade/*.tar.gz
tar (child): /tmp/amtupgrade/*.tar.gz: Cannot open: No such file or directory
tar (child): Error is not recoverable: exiting now
tar: Child returned status 2
tar: Error exit delayed from previous errors
Error in Amethyst upgrade - upgrade file was incomplete or corrupted
Finished /tmp/amtupgrade/*.tar.gz
[2008-01-30 16:05:13] Version [1.5.12.1]******** UPGRADE EXECUTION STOPS HERE *************
[2008-01-30 16:05:50] Version [1.5.12.1]******** UPGRADE EXECUTION STARTS HERE *************
Installing /tmp/amtupgrade/*.tar.gz
tar (child): /tmp/amtupgrade/*.tar.gz: Cannot open: No such file or directory
tar (child): Error is not recoverable: exiting now
tar: Child returned status 2
tar: Error exit delayed from previous errors
Error in Amethyst upgrade - upgrade file was incomplete or corrupted
Finished /tmp/amtupgrade/*.tar.gz
[2008-01-30 16:05:50] Version [1.5.12.1]******** UPGRADE EXECUTION STOPS HERE *************