Views Infinite Scroll module can't handle more than one infinite view in the same page.

Just change line 66 from > 1 to > 100 or whatever you have for that page... it will stop alerts on web browser.

Line 66 on file

sites/all/modules/views_infinite_scroll/js/views_infinite_scroll.js

 else if(Drupal.settings.views_infinite_scroll.length > 100) {
          alert(Drupal.t('Views Infinite Scroll module can\'t handle more than one infinite view in the same page.'));

I had 12 on one page, so this fixed it :D

The above is not a fix as their should not be multiple items in the settings array for the same scroller.

I get this problem with a view in a panel, but only if the panel is cached.
I only have 1 infinite scroller on the page, but looking at the Drupal.settings.views_infinite_scroll array, I see there are 2 array entries for the same scroller, just keying these array elements by their selector may fix this issue (though still wont allow for more than 1 scroller per page, which the module probably should). It also means the js will need to change as the setting object will no longer be an array, but an object.