Are you looking at the Canon jpeg exif, or CHDK DNG? exif can be wrong when CHDK overrides are used but 1/0 is strange.
What did the images look like?
What software are you checking the exif with? I use exiftool when I need full details.
In your screenshot, you have disable overrides set to yes. This would prevent the override from being used at all if it was set when you were shooting.
In yesterday's test with 1.5, they looked like normal photos with automatic exposure.
And that's to be expected since they did not expose for the 17 or 34 seconds that I specified, they seemed to expose for ~1 second.
OS/X lets you view the exif of DNGs and JPGs.
I just tried with 1.4.1 and long exposure is not working with it either.
OK, I got long exposure working with 1.4.1.
The issue was that the UI is a little confusing. I had "disable overrides" checked, because somehow my eyes read it as "enable overrides".
I guess I assumed the default behavior is to disable overrides.
The checkbox next to the long exposure value became unchecked when I downgraded from 1.5, so once I checked that too it worked.
OK, I got long exposure working with 1.5 too.
Soon I will do some long exposure tests...