If a user uses the percent symbol in the title of their thread, the resulting hyperlink does not work because the forum isn't escaping the percent character.
Case in point:
https://www.toyota-4runner.org/5th-gen-t4rs/273224-memorial-day-roof-rack-sale-10%-off.html
vs
https://www.toyota-4runner.org/5th-gen-t4rs/273224-memorial-day-roof-rack-sale-10%-off.html
Case in point:
https://www.toyota-4runner.org/5th-gen-t4rs/273224-memorial-day-roof-rack-sale-10%-off.html
vs
https://www.toyota-4runner.org/5th-gen-t4rs/273224-memorial-day-roof-rack-sale-10%-off.html