Hi Alex, hi everyone else.
We've seen the issue on this tracker and have added it to our internal bug tracking system, as soon as it appeared.
Unfortunately, a big product roll-out is binding up all of our resources since the start of the year.
That means, that we can't fully focus on external bug reports, as long as we can't replicate them in our setup. We had used the "Role-Based Permission Plugin" earlier, but switched to a different in-house permission plugin, making replication problematic.
Even when we used the other plugin, we did not see an issue like this. As far as security permissions go, the Inheritance Plugin behaves exactly like any other Project, since it leaves permission handling to the "Project" superclass. The obvious caveat to this is of course, that permissions do not "trickle-down" to inherited projects. Job permissions must match a job (or its name) exactly, no inheritance is applied on them.
The weirdest thing about the issue described in the bug report is, that the screenshot shows the "Build" options in the side-panel. Those check exactly the same permissions that are needed for actually scheduling the build.
We'll try to replicate this issue and see if we can indeed find a problem.