Ever since pre-patch, the text (both in shops/quest speech text boxes and in my chat box) has characters like lines and dots above it. This makes it difficult at times to read what is written. This issue was not resolved with disabling addons. I haven’t spoken to anyone else who is having this issue.
Which pre-patch are you referencing? If you’re talking with regards to TBC Classic, this is not the correct forum. You should try WoW Classic Bug Report.