7.1.5 upgrade broke the Forums module

Ok so after doing the 7.1.5 upgrade the editor used in the forums is missing and it just looks like a plain text editor. when I try to uninstall it I get the error 

Uninstallation of: Forum Failed

Any Ideas?

First of all, uninstalling the Forum module would have deleted all posts.

I assumed you backed up your site and database before doing the upgrade.  Also, best to test upgrades on a clone of one's site instead of a live production site.

The editor in the forum uses the same init as any other area uses.  It is possible that the upgrade corrupted the file that initialises the tinyMCE for the editor, that would have been the first avenue to take, not uninstalling the forum as it is just going to use the files that are in the module if you do an install after uninstalling.  Uninstalling a module removes the database tables; so why do people jump on uninstalling a module?  The database for the forum contains nothing about TinyMCE.

I have already replaced //plugins/tiny_mce with the latest version from the full Dolphin 7.1.5 download, cleared the cache, cache_public and tmp directories of everything apart from .htaccess and changed to default template and the Tiny_MCE Editor is still missing, I have managed to uninstall and reinstall the module as well and this has also not fixed the issue. :/

Are you using a db cache engine other than file? If so, switch to file cache and give it another try.

I am using File cache 

/cache & /cache_public folders are permission 755?

yeah and PHP is running as SUPHP 

Is JS caching turned on?  TinyMCE is a javascript app.

I have done a bit more testing and now believe this is a Client Side issue with my Chrome setup as in Maxthon and firefox it's fine but Chrome Incognito mode still has the issue. 

If you are not seeing the TinyMCE editor, then most likely it is a javascript issue.  Use the console in Chrome to check for javascript errors.