Ask me to open a file

One thing you should do is probably update to 7.x-3.x first. Many bugs got fixed in the meantime.

In general the new views UI looks better currently in the SEVEN theme.

I've never seen the control in the screenshot posted. I'm guessing this is something provided by a module? Issue needs to be posted against that module, as per the submission guidelines.

Same problem here, when click "add" filter criteria, nothing in the popup form seems to work: the search input, the filter combo box, and the check boxes all of them doesn't produce any Ajax effect, when submitting the form in firefox 4, it asks me to open a JSON file, when submitting the form in Chromium, it displays the json file's contents without asking!
what's this..!?

I doesn't like you.

Perhaps you should at least report the error detailed for itself.

who is "you"? :S
anyhow, this is all details I know about the error!

Ups i wanted to write "It doesn't like you". Sorry!

At least posting the error message is possible. If you don't want it this bug is not reproducable and
it can marked as can't be reproduced.

Additional please update to the latest version of ctools and views to be sure that this is not a bug which got fixed
in the meantime.

ok, no problem then.
the problem is there is no error massage, the json script is opened as a file instead of being executed, so no filters can be added.
updating is does not solve, I have the very last version of every thing including Views and ctools.

Also some modules are known to interfere with Views' AJAX, particularly Drupal for Firebug.

is there are other modules known to interfere with views? I don't have drupal for firebug at all.

update: this is my screenshot

Most browsers have a javascript console (I'm not familiar with Chromium so I don't know how to open it in that browser) that you can use to find out if there are javascript errors. It looks as though javascript has crashed and it's trying to submit the form normally rather than post it via AJAX, and the only way to know more is to find out what javascript is saying has happened.

done, it's even turns more strange!
once I activated the console, ajax worked more like normal, the search input worked, the combo filter and form submitted successfully.
that's the console output:

[18:10:24.867] POST http://.../admin/structure/views/view/fullcalendar/edit/page_1/ajax [HTTP/1.1 200 OK 3038ms]
[18:10:24.937] GET http://.../themes/seven/images/ui-icons-454545-256x240.png [HTTP/1.1 200 OK 745ms]
[18:10:27.754] element_settings.url is undefined @ http://aldarweesh.org/misc/ajax.js?v=7.2:132
--
[18:10:44.995] POST http://.../admin/structure/views/ajax/config-item/fullcalendar/page_1/filter/type [HTTP/1.1 200 OK 3348ms]
--
[18:11:04.211] POST http://.../admin/structure/views/ajax/config-item/fullcalendar/page_1/filter/type [HTTP/1.1 200 OK 5406ms]
--
[18:11:29.634] POST http://..../admin/structure/views/ajax/delete-item/fullcalendar/page_1/filter [HTTP/1.1 200 OK 3344ms]
[18:11:33.105] GET http://..../misc/tableheader.js?lms3je [HTTP/1.1 200 OK 334ms]
--
[18:11:43.325] POST http://..../admin/structure/views/ajax/delete-item/fullcalendar/page_1/filter [HTTP/1.1 200 OK 5379ms]

[18:10:27.754] element_settings.url is undefined @ http://aldarweesh.org/misc/ajax.js?v=7.2:132

This is likely the culprit. I remember seeing a problem like this -- update to the latest fullcalendar dev, I think? I'll ask Tim to look, he may remember this.

Ahh, it was this: #1141410: Drupal.ajax expects element_settings.url -- update your views to -dev.

I'm so sorry, the problem is back again, this time nothing worked, I've updated to the June 17 version of Views, which supposed to include the patches that MerlinOfChaos mentioned in the link..

Experienced the same problem, when I wanted to activate filter criteria a box opened which asked to open JSON file.
I received the javascript error pointing to
search = this.$searchBox.val().toLowerCase();
The thing is that in my case the error had nothing to do with views but it happened as an interaction with a module where some form elements where unset.
So best thing to do in this case is disabling all modules and enable them one by one.

Jurgen.

function donotshow_form_alter(&$form, $form_state, $form_id){

    //unset ($form['options']);      
   

This was the code causing the error.

What was the solution for this issue because I am having similar issue any time I try to apply settings on views or any where else