Hi, having the same issue with ICAL. The Google Calendar is working correctly. I have tried every combination of time zone settings in the plugin and in the WordPress settings. My timezone is -8.00 and my ICAL export is UTC 0.00.
Thanks for the patience. We could dig in and identify the bug in our code that’s generating the offset. A patch for this is almost ready but needs some additional QA, and mostly sure it will be ready tomorrow. I’ll let you know when it’s ready…
Just jumping in to let you now that the patch for this issue is included in 4.0.1 and it just released today. Keep your eyes open for the update and please do let us know if any other issues pop up and we’d be happy to help. 🙂