I saw a question on meta about a long standing site bug. It is a bit hard to discern, so some people thought it was unreproducible and closed it as such. However several others have verified that this is happening to them (including me). Then someone pointed out that it's an old bug still unresolved. They linked to a previous posting detailing the exact issue.
Is it still appropriate for the question to be reopened so it can be marked as a duplicate?
I understand that reopening to close a question with a more correct reason is discouraged and not productive. However duplicates have value to the site in allowing more people to find the correct answer.
In this case is it worth reopening to reclose the question or is it still discouraged?