WRONG AVAILABLE FLAG in Google calendar.
Immediately sync in case Outlook change
Recurring meeting END DATE do not sync from outlook to Google if you change the date in outlook
old version checkbox was this way:
I have found that one reason of NO SYNC on some appointment is the checkbox "Months (future) to be sync" (see pictures) Old version of GCSM needs ZERO months to say "all future months" New version needs uncheck the checkbox to say "all future months"
I confirm the BUG exist. Version 4.1.28 doesn't properly sync the appointments in the calendar (both sides from google or from outlook) re-installing an older version the bug disappear (I have installed the version 4.1.25)
Old problem has not appeared in the last days, so I feel you have fixed it; but today I have seen a new strange error. GCSM says OUTLOOK CONTACT DELETED, but the contact is not deleted at all (See attached picture). I simply click CANCEL at deletion prompt and restart SYNC and GCSM doesn't say again contact deleted. VERY STRANGE ERROR.
Yes 4.1.11 is working correctly. But better to wait 2-3 weeks to be 100% sure.