perspective warp tool: sides disappear when using the tool... cannot complete when using the tool.

I was in the full release version when making the above screen shot, so thought I'd better test it with the beta version.  It still works fine for me, but I see it uses icons now in the Options bar.  Are you understanding how they work?

There's now way of know what is going on from your brief description.  Can you show us a screen shot?  It needs to be full res, and of your entire workspace with  Perspective Warp if the state that is causing your issue.

I'll make a guess or two though.

Have you tried zooming out so you can see all of the transform handles?

Have you aligned the warp zones accurately to the subject, and do have at least two zones selected and joined together?

Show us a screen shot and explain in more detail.

Thanks