I use a simple custom plugin to adds a custom post type to use with a slideshow plugin. In addition to setting up the CPT it also adds a custom 32x32px icon to the top of the CPT page and an image sprite for menu icons (B/W version & colour version for hover & selected states) in the admin using a function to add the following css to admin:
It worked fine in WP v3.32 on all browsers I tested on, and after updating WP to v3.4 still appears fine on desktop browsers & iPhone 3GS, however the icons no longer show correctly on the iPad (3rd Gen).
Is the menu output differently for the iPad? I’ve not managed to do a “view source” to find out.
Is there a better/recommended way to add the icons for a custom post type to get the hover/selected state?