When inside <reference|>, one is able to use tab completion to pick p from possible labels. This works well on Windows but for some reason it for all recent versions (99.7, 99.8, 99.9) that I tried under Lubuntu.  (It did work on a live install of antiX however, so this is most likely not a direct TeXmacs problem. 

Would be grateful for any pointers on how to fix this.  If it should be of any use, when I press the tab key, the status line in TeXmacs reads as follows: 

"src roman tt src #228". 

Many thanks and kind regards, 

Murali