If you’re referring to the admin menu dropdown backgrounds being transparent when using one of the included color schemes, then yes, I am aware of the issue and it has been fixed in the new version of the plugin which is pending release.
The new version should be released some time very soon. It is simply that I do currently have a day job, so I can’t always commit tons of time to this plugin. But, the new version will release as soon as possible. So, be sure to keep an eye out for that.