Seems to be a user error. I just tried my plugin with 5.0.12 for the first time and it seems to work.
Could you upload your wiki or a small non-working example somewhere to take a look at it? -- 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 http://groups.google.com/group/tiddlywiki. For more options, visit https://groups.google.com/d/optout.