Air file is damaged when using update framework

Question

Hi,
The air file works fine on windows, and reinstallation on linux works.
On ubuntu karmic, we get this in our install logs:
$cat .airinstall.log
UI SWF load is complete
UI initialized
starting user confirmation
Version of this installer: 1.5.2.8870
Newest installed version: 1.5.2.8870
Installation type: patchSame
begin quitting
$cat .airappinstall.log
Starting update of /opt/location
Updating from file:///home/joe/.appdata/com.name/Local%20Store/AirFile.air
Updating to version 1.5881
UI SWF load is complete
UI initialized
Unpackaging to /tmp/FlashTmp.ryWErP
failed while unpackaging: [ErrorEvent type="error" bubbles=false cancelable=false eventPhase=2 text="signatures not yet set" errorID=0]
Re-launching application from /opt/location
starting cleanup of temporary files
application installer exiting
Can you tell me what this could be, and how to fix it?

Answer 1

More information after an uninstall and reinstall:
$ cat .airappinstall.log
Starting app install of http://location/file.air
UI SWF load is complete
UI initialized
Downloading file to /tmp/FlashTmp.EIau3j
Received HTTP Response Status event
Response URL is http://location/file.air
Waiting for user confirmation
User confirmed action: install
Unpackaging to /tmp/FlashTmp.tylaQZ
failed while unpackaging: [ErrorEvent type="error" bubbles=false cancelable=false eventPhase=2 text="Error #2058" errorID=2058]
starting cleanup of temporary files
application installer exiting
This says it's something to do with decompression. I am able to open and extract the file myself with archive manager on linux.