Problem With My Yahoo Signature, Yahoo Signature Problem

[Nancy]

After several years of no issues, my Yahoo Signature is suddenly jumbled together and I can't correct it.

For instance, signature should look like this:

John Doe
http://www.johndoe.com
PO Box 1234
Any City, State, Zip

Now looks like this:

John Doe http://www.johndoe.com PO Box 1234 Any City, State, Zip

Any help resolving this would be appreciated. FWIW, this problem only occurs on one of several Yahoo email accounts that I have.

Thanks,

NSD