This was a bug present in wpForo 1.x which has been carried over to wpForo 2.x.

In wpf-includes/class-template.php (wpForo 1.x) or classes/template.php (wpForo 2.x):

the buttons method includes a tooltip for most actions (quote, report, sticky, private, solved, approved, close, tools, edit, delete) but the tooltip for Reply and Link (post link) is missing.

Link has a default yellow background colour tooltip but it's inconsistent with the other tooltips with black background colour (pic attached illustrates).

I added the missing tootips manually with CSS but it would be good if this was fixed.

Thanks,

fawp