Hi CreativeImages,
There is one more step that needs to be done in order to get these listings posted and avoid receiving the "Invalid Characters" error message.
First, edit each of your seller details profiles and resave them without making any changes.
Then, open and resave any listings that you would like to post before posting them.
Once you have done these things, the fix should take effect and you should be able to post these listings successfully.
-Mike