> Clicking on a selection didn't make it look like a tag (blue box)
This will be fixed in the next patch release
> Once you have more than 4 blue tags in the field, additional ones don't get added or aren't visible.
I'm able to ad any number of tags and the input expands vertically to accomodate. What browser/os are you on?
> It would be nice if the 'prompt' option also read from the html5 placeholder attribute
Good idea, will add it to the queue!
> tag items that are set should probably be settable via the option value not the display text, or maybe both?
Not sure what you mean.
> An option to remove the blue arrow
Blue arrow comes from the Array plugin, omitting which will result in the missing arrow.