7.2.2 and 7.2.2dev-Version break CKEditor 3.6.2

Not much, but we did change the baseHref setting as part of introducing support for AJAXy lazy-loading, which I suppose could affect that. Strange though since it should default to the correct path.

Could you try creating a simple module like this and see if it helps:
sites/default/modules/custom/custom.info

name = Custom
description = Custom tweaks for this site
core = 7.x

sites/default/modules/custom/custom.module

/**
 * Implements hook_wysiwyg_editor_settings_alter().
 */
function custom_wysiwyg_editor_settings_alter(&$settings, $context) {
  if ($context['profile']->editor == 'ckeditor') {
    $settings['baseHref'] = $GLOBALS['base_url'] . '/';
  }
}

I just remembered someone else having this issue, maybe it was a bad idea to fall back to the default value of that setting.
Are you running your Drupal site in a subfolder or is it directly on the domain?

This patch simply puts back the baseHref setting removed in #356480: Lazy-load editors, with an additional comment on why it's there.
Just want sun to see this before committing it.

Thanks, let's do this.

Committed #2 to 7.x-2.x and just the comment to 6.x-2.x and 5.x-2.x to keep things in sync.

Thanks for reporting, testing and reviewing. The dev snapshots will be updated within 12 hours and this fix will be part of the next official release.