Hi David, Apologies I updated your post to remove your email address, purely to stop search engines and spammers picking it up, I hope you don't mind.
With regards to the issue you describe, have we had a previous conversation on this? I am not sure what issue you are referring to, there has been so much happening in the myCal space recently and its quite possible I have forgotten to fix the issue you described.
Regards John
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It has to do with the recent fix relating to editing an all day event. Sometimes the event just goes away. Sometimes it adds two or three days adjacent to the original date. Hope this helps.