Ah yes, I had the same problem, I know what to do...

Don't click "add picture" at the top, click the one at the bottom along the grey bar... Worked for me 

Off the Support Forum:

The ezGallery is a great feature for your Forums enabling you to upload your own pictures which this guide will explain.
Guide from www.CFcoding.createaforum.com


First off - go to Admin>Gallery>Gallery Configuration>Click Install and Enable ezGallery.
After doing so, go back to the Gallery Configuration.
You may edit all options in Features + Layout to your liking. Another extensive guide will be made in the future regarding Gallery Configuration.

Now you should make a Category *Or you may use the default Member's Gallery which you could edit*
Add a title (ex. Gallery), add a gallery icon *if you wish*, a description, etc.

Once you have added your Category, click on the "Gallery" button and Click on the gallery you have just made.

From here you will see two bars on the bottom:

Pages: [X]
Bulk Add Pictures  Add Sub Category  Add a picture  -   Return to Gallery

X - the number of pages the gallery has
Bulk Add Pictures - selecting this will allow you to add numerous pictures at the same time
Add Sub Category - allows to to add a sub category to your parent gallery
Add a picture - allows you to add A picture
Return to Gallery - returns you to the Gallery


From here you may add a picture by either clicking Bulk Add Pictures or Add a picture.
     - Title the picture
     - Choose which gallery to place it in
     - Give it a description if you wish
     - Give it keywords for others to find it easier
     - Upload the picture
     - If you wish to rotate the picture - input the amount of desired degrees to rotate it.
     - Choose if you want to be notified of any comments people leave on your picture

After the picture is uploaded you along with others should now be able to view it (based on permissions). You may view your picture, edit it, etc.

Hmm, not sure, sorry, will have a fiddle in the admin section and wait and see.... 

All of it, I had already set it for you all to be able to post photos, so not sure what it going on 

I have to approve your images  Well, I approved yours WT, and they're up. 

If you have to do that all the time, I'm not going to bother

GRRRRRRRRRRRRRRRRRRR

Just tried another picture to mygallery and got the same issue:

Picture Not Approved

give up

Did you approve it or does it take the system a while to auto approve?

One to go