Have you tried:
– deactivating all plugins to see if this resolves the problem? If this works, re-activate the plugins one by one until you find the problematic plugin(s).
– switching to the default theme to rule out any theme-related problems?
– resetting the plugins folder by FTP or phpMyAdmin? Sometimes, an apparently inactive plugin can still cause problems.
Tagging normally works just fine in 2.8, so the problem is somewhere else in your theme/site.
THX, esmi, my work-around was to use the SIMPLE TAG” box ABOVE the “Post Tags” which I had been using
BUT
I will check my Plug-ins
🙂