Custom Maven Plugin repository

If you are developing or using custom maven plugins and would like to download them from your custom repository, you should define them like

<name>S3 Repo</name>
<url>your custom repo url</url>

Although you have already defined that custom repo within repositories, you will not be able to download them as plugins.

Don’t use transparent icons as App Icons

Avoid using any app icon including transparency as it will result with icon having a black backgroud which is ugly. The documentation actually states this here 

Avoid transparency. An app icon should be opaque. If the icon’s boundaries are smaller than the recommended sizes—or you use transparency to create “see-through” areas—the resulting icon can appear to float on a black background, which tends to look especially unattractive on the beautiful wallpapers that users choose.