Can’t set undefined argument value for view-pane

I’m building page-panel with panel2 beta3 module and now I have a problem with one of my view-panes.

This view pane displays nodes marked by term passed through view argument or list taxonomy term names if argument value is not defined. This done with “Taxanomy: Term Name” argument in view.

The problem is in view-pane argument.

• If I use “No argument” as argument source, panel2 module send “*” as view argument indirectly. That forces view to display undefined term “*”.
• If I use empty string as fixed argument value, view use links for term names list in following form: “/my_view_name//term_mane”. To produce valid urls, l()-function change them to “/my_view_name/%2Fterm_mane”. Those links references wrong pages.

That means I can’t use such view-pane at my panel. It looks like using “*” as indirect argument is a bug in panels_views module.

Any suggestions? Maybe, didn’t understand something?