I can’t find anything in the bug database about this. If you filed a report and still have the case number then please can you post or PM it and I’ll see what the status of the bug is.
It turns out that a decision was made not to pursue this bug in April this year. The stated reason was that it could not be reproduced with text copied from most applications (ie, anything other than the test app that you submitted). This led the developers to believe that something about your app was producing the error rather than a fault with Unity. It’s a bit odd that you weren’t informed that the case was closed, so I guess something must have gone awry somewhere. However, if you still maintain that this is a bug with Unity then you are welcome to contact support@unity3d.com about the existing case or submit a new bug report.