MANIFEST_MALFORMED

Has anybody else come across this...

Run on device gets through the zip align etc but then I get a message to say the Manifest is Malformed

Any ideas?

-do-debug:
Running zip align on final apk...
     [echo] Debug Package: C:\Users\Mark\AppData\Local\Temp\android818157942760425067sketch\bin\SessionShedDemo1_0-debug.apk
[propertyfile] Creating new property file: C:\Users\Mark\AppData\Local\Temp\android818157942760425067sketch\bin\build.prop
[propertyfile] Updating property file: C:\Users\Mark\AppData\Local\Temp\android818157942760425067sketch\bin\build.prop
[propertyfile] Updating property file: C:\Users\Mark\AppData\Local\Temp\android818157942760425067sketch\bin\build.prop
[propertyfile] Updating property file: C:\Users\Mark\AppData\Local\Temp\android818157942760425067sketch\bin\build.prop

-post-build:

debug:
Failure [INSTALL_PARSE_FAILED_MANIFEST_MALFORMED]