Hello,

This could be a conflict...
Do you use some extra plugin in your editor ? (for example, button editors).
And what is your editor ?

Often, jQuery conflict in event edit are due to an other extension used with the editor.

Regards,
Cyril

iCagenda is working fine with JCE (only codemiror editor is giving trouble, but it is a know issue in Joomla core).

What you have to check is each third party plugin. I see only an issue with one plugin.

Look at the code source generated, and see if in hearder which extensions are loading jQuery Library. Or scripts files.

This could give you information.

I really like the looks of iCagenda, but it seems awfully touchy to it's neighbours.

In fact no. But if you have just 1 plugin loading its own jQuery Library whithout checking if already loaded, this could give a jQuery conflict, and so problems for each function using scripts.

Note: a few plugins were found on this forum as giving conflict due to a wrong loading of jQuery. But in fact, it's not always a bad coding, it's just because it's difficult on Joomla 2.5 to prevent jQuery conflict, excepted with the great jQuery Plugin.
This why Joomla 3 is wonderful! : jQuery is integrated, so no conflict possible if all extensions installed let Joomla 3 loads jQuery (as iCagenda, and all serious extensions do on Joomla 3).

Amema wrote: Put my site on Debugging mode. Seems that the loading time wiht iCagenda is 77 ms and without it, 52 ms.

There is a drove of warning-like messages that iCagenda makes a lot of duplicate queries to db. Without iC I get 2 lines, but with iC there are 13 lines (mostly double duplicates, but a few with a lot of duplicates). But I can't understand what to do, if at all.

Hi!

This is normal

Do you have tested single dates in frontend submission form, to see if datepicker is working in frontend ?

And if not, an online link would help me to check a possible issue...
Regards,
Cyril