You need to put quotes around the filter like this: <<countTiddlers "tag[Something With Spaces]">>
otherwise it is split up as a space separated list of inputs and only tag[Something is passed as the first parameter. -- 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 [email protected]. To post to this group, send email to [email protected]. 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/c616bf4e-2e4a-4bd1-9d07-c668cef40696%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.

