All my fonts in one page show in bold. Is it carriage return problem?

I just installed 2.0 and it works fine. I also disabled RTE and installed quicktags. However, I noticed one of my pages shows all bold letters. I think it has to do with carriage return and no idea how to fix it. I had similar problems before but can’t remember what wast the solution. Can you please help me to resolve this problem.

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