I think you are looking at the difference between a TiddlyLink to a non-existing tiddler vs. straight text
ROF does not create a link to the corresponding text because it doesn't contain a mixture of upper and lower case letters RoF creates a tiddlyLink. If there is no tiddler named RoF then it displays in italics (= doesn't exist) -- You received this message because you are subscribed to the Google Groups "TiddlyWiki" group. To unsubscribe from this group and stop receiving emails from it, send an email to tiddlywiki+unsubscr...@googlegroups.com. To post to this group, send email to tiddlywiki@googlegroups.com. Visit this group at https://groups.google.com/group/tiddlywiki. To view this discussion on the web visit https://groups.google.com/d/msgid/tiddlywiki/f6ab32f3-cf1a-4491-a7af-a7cb4573122d%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.