Anytime a text line in Trac Wiki article or Trac Ticket begins with a monospaced word, the remainder of the whole paragaph is continued on the same line infinitely wide behind the article and browser border and is not wrapped anymore. This happens with Internet Explorer 7, but not with SeaMonkey? (possibly everything from Mozilla class) and Safari. The exception is a monospaced word at the beginning of paragraph (1.st line), in this case usually nothing happens, but this paragraph while in preview is indeed broken (or unwrapped) too.
("Component: Web - Forums" is actually wrong, it belongs just to Trac, possibly Wiki formatting generally. Possibly an unrepairable bug of IE7's html interpretation.)