Regarding the 'issues' does this mean that the Rohloff hub/wheel that I have in my 10 year old mint Raven Sport Tour requires a rebuild?
Not in my opinion. The wheel was presumably built by Thorn/SJS, so it should be sound.
When the rim needs replacing it might be worth fitting flange support rings as part of the rebuild.
What Martin says, plus -
You've nothing to gain, the hub is already out of warranty, which only applied to the original owner anyway. As explained in the Thorn documentation the rings don't stop the hub from breaking, what they do is allow you to continue using in the unlikely event it does. My experience is you're going to be able to ride home with a spoke or two missing anyway, so unless home is going to be many thousands of miles away the rings serve no purpose. I haven't got them on either on mine and I'm not intending to do anything about that, I might include them in a future wheel build, but as both are disc brake that might be never.
If I had purchased a secondhand Rohloff wheel, I might be tempted to have the spoke tensions checked. That's not to question the build, but there's some unknowns between then and now. It's simple enough to do yourself if you have or can borrow a tension meter, if not take it to a wheel builder and get them to do it while you watch.
