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I would have given this 5 starts but then I updated to version 1.9 All the timings on repeating events (apart from the first one) showed the wrong time). I had to go back to version 1.8.2 to get a working version. Main grouse is that although I posted this as a problem I haven't so far had any response...

I love this plugin's features, but it is imposing huge performance overhead on my site (a neighborhood community site). Disabling the All-In-One plugin improved load times from an average of 16 seconds to an average of 5 seconds (still too long -- but load times of 15+ seconds are unacceptable!).

I tried saving the calendar theme options as recommended in one post -- no change. I tried checking the "skip the loop check" option -- no change.

I don't have any more time to waste on this. Looking for another calendar plugin now. Bummer!

It looks so good - I even managed to hook the calendar up with a events on Facebook. Then I noticed that the times were wrong - they had been changed by All-in-One Event Calendar. I had to set them manually. Then a post disappeared from the shown event list.
I really like everything about this calendar - but I really need one that I can trust. So - back to checking out plug ins. Sigh.

still performance problem. plugin loads lots of scripts and slow down page.
functionality is great, but author should improve loading speed. sometimes simpler is better

Warning: 1 in 10 users of your site, users who still use IE8, will not be able to use the event calendar on your site.

In the theme I use for my site, views_base, the IE8 browser kept getting forced into compatibility mode with this module enabled. And the date in the upcoming events block suffered from some weird variant of the old peekaboo bug.

Yes, it's a pain to work with IE, but IE8 is the only supported browsers for users still on Windows XP which Microsoft doesn't end support for until April 2014.

Here's a developer's note on which browsers they support: http://help.time.ly/customer/portal/articles/792172-browser-support-for-the-all-in-one-event-calendar

It keeps overwriting my htaccess and causing a 500 Internal Server Error which makes my site and all the site under it totally out of commission. This plugin has great potential if I could get rid of this bug and any other problems. I had to disable it. I would be willing to pay for this plugin at a reasonable cost or make donations for it if it worked.

Works to a point, have to disable any Caching/Minify aspects for the pages or Widgets. Also, in their latest version, 1.9.1, the Facebook Feeds do not work.

Overall, it took a LOT to get this functional on my sites, and all the features still do not work. Beyond that, this plug-in has GREAT potential, and I do like it... just wish it would have been easier to integrate and use.