Thanks, I think I found it! The upgrade tree could grow past the bottom of the screen and push the 'Descend' button out of reach. Fixed in 0.27.1, just uploaded. Out of curiosity, what screen resolution were you playing at?
You should be able to scroll down now. This is a temporary solution until i rearrange the info on the burrow screen in such a way that it stays restricted in size.
changed the dig screen so that the information no longer piles up at the bottom. Now you can just click on a construction and manage it in the pop up. Give it a try and tell me how it goes.
