[NTG-context] t-bib: URL and '%'; spacing between number and text

Hi all, I have a .bib file which contains @article{foo, url = {http://..../a%bb%cc.html} i.e. an URL with % sign. I want to typeset it in the references using: \def\gotoURL#1{\useURL[foo][#1]\goto{\url[foo]}[url(foo)]} \unprotect \setuppublicationlayout[article]{% ... \insertbiburl{ }{.}{}% The problem is: If I do not escape the % signs, I get a TeX error. If I escape them with \%, both the link and the printed text show the backslash. What is the proper way of doing it? Another problem is that I have in the reference list, the space between "]" and the author name in [123]Author is too small (they overlap). Is there an easy possibility to make the spacing automatically right or does one need to tweek it manually? Tobias