Answers.Body: <p>Jern,</p>
  
  <p>This is because of Joomla theme css might be conflicting with CiviCRM css. Try switching the theme to default one if you can replicate the same issue. I tried on my local machine on 5.6.0 and couldn't replicate the issue. Also try to perform CiviCRM cleanup cache if it helps.</p>
  
  <p>Try after reverting the <a href="https://github.com/civicrm/civicrm-core/commit/8aa67b8570e786f5d0348d2d1bedeeebca17fafb" rel="nofollow noreferrer">commit</a> in your core file. </p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2018-10-09T12:47:54.813Z
Answers.Text: I've tried it on two installations, which have completely different themes, but both show the same problem. Both are running on php 7.0. Could this be an issue?
Answers.UserDisplayName: Jern
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2018-10-09T13:01:48.633Z
Answers.Text: Actually, what I wrote is nonsense. It's the back-end template which matters here. Both installations are using the default back-end template Isis.
Answers.UserDisplayName: Jern
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2018-10-10T09:47:48.207Z
Answers.Text: We have seen this issue, too using Joomla 3.8.x and CiviCRM 5.6.0.  Our live site is still running CiviCRM 5.3.2, and does not show the problem. We are using PHP 7.1.x on some sites, and 7.2.x on a development site.  Both show the issue.  Clearing caches did not solve the issue.
Answers.UserDisplayName: Stephen Palmstrom
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2018-10-10T10:17:37.153Z
Answers.Text: Jern, I have updated my answer with a link of commit to revert. In short you will need to add those removed lines back into Joomla.css file. Do let us know how it goes, if it works then i will create a regression issue against it.
Answers.UserDisplayName: Pradeep Nayak
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2018-10-09T08:34:36.013Z
Answers.LastActivityDate: 2018-10-10T10:16:14.380Z
Answers.LastEditDate: 2018-10-10T10:16:14.380Z
Answers.UserDisplayName: Pradeep Nayak
Body: <p>CiviCRM 5.6.0
  Joomla 3.8.12
  php 7.0.32</p>
  
  <p>On the activities tab of a contact, when you create or view an activity, the panel which pops up is displayed behind the black CiviCRM menu bar, and also behind the main Joomla menu bar. The same happens with when you view an activity in the Find Activities results page.</p>
  
  <p>Not a big deal, but needs fixing.</p>
  
  <p>Update: it's not only the activities page/tab. It seems to be every page. Wherever there's a pop-up window or a pull-down menu, the black CiviCRM menu is in front of it.</p>
  
  <p><a href="https://i.sstatic.net/RX1fH.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/RX1fH.png" alt="enter image description here"></a></p>
  
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2018-10-09T08:06:24.563Z
Comments.Text: Can you share some screenshot of the menu?
Comments.UserDisplayName: jitendra - fuzion
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2018-10-09T08:20:45.013Z
Comments.Text: Works OK on my 5.6.0 with Drupal
Comments.UserDisplayName: Andy Clark
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2018-10-09T12:48:18.493Z
Comments.Text: Added a screenshot
Comments.UserDisplayName: Jern
Tags: <activities><css>
Title: Civi 5.6.0 - wrong css z-index on Activities page when creating/viewing activity
ThreadText: # Civi 5.6.0 - wrong css z-index on Activities page when creating/viewing activity
  
  (Asked by: username_0 on 2018-10-09)
  
  CiviCRM 5.6.0
  Joomla 3.8.12
  php 7.0.32
  
  On the activities tab of a contact, when you create or view an activity, the panel which pops up is displayed behind the black CiviCRM menu bar, and also behind the main Joomla menu bar. The same happens with when you view an activity in the Find Activities results page.
  
  Not a big deal, but needs fixing.
  
  Update: it's not only the activities page/tab. It seems to be every page. Wherever there's a pop-up window or a pull-down menu, the black CiviCRM menu is in front of it.
  
  [![enter image description here](https://i.sstatic.net/RX1fH.png)](https://i.sstatic.net/RX1fH.png)
  
  **Tags:** activities, css
  
  > **Comments:**
  > **username_1**: Can you share some screenshot of the menu?  
  > **username_2**: Works OK on my 5.6.0 with Drupal  
  > **username_0**: Added a screenshot  
  
  ---
  
  ## 1 answers
  
  ### Answer by username_3 on 2018-10-09. Score: 0
  
  username_0,
  
  This is because of Joomla theme css might be conflicting with CiviCRM css. Try switching the theme to default one if you can replicate the same issue. I tried on my local machine on 5.6.0 and couldn't replicate the issue. Also try to perform CiviCRM cleanup cache if it helps.
  
  Try after reverting the [commit](https://github.com/civicrm/civicrm-core/commit/8aa67b8570e786f5d0348d2d1bedeeebca17fafb) in your core file.
  
  > **Comments:**
  > **username_0**: I've tried it on two installations, which have completely different themes, but both show the same problem. Both are running on php 7.0. Could this be an issue?  
  > **username_0**: Actually, what I wrote is nonsense. It's the back-end template which matters here. Both installations are using the default back-end template Isis.  
  > **username_4**: We have seen this issue, too using Joomla 3.8.x and CiviCRM 5.6.0.  Our live site is still running CiviCRM 5.3.2, and does not show the problem. We are using PHP 7.1.x on some sites, and 7.2.x on a development site.  Both show the issue.  Clearing caches did not solve the issue.  
  > **username_3**: username_0, I have updated my answer with a link of commit to revert. In short you will need to add those removed lines back into Joomla.css file. Do let us know how it goes, if it works then i will create a regression issue against it.  
  
  ---
  
  