Is there some trick needed to get graphviz's HTML labels working from graph-tool ? I've been making some nice svg plots from graph-tool setting the label/shape/URL/tooltip vertex properties, but now I want to be able to have multiple URL links from each node and HTML labels seem the obvious way to do this. I have an idea it ought to be as simple as setting the label strings to something like (simple test case) <<TABLE><TR><TD>left</TD><TD>right</TD></TR></TABLE>> (and this seems to work as expected used in a .dot file) but setting the same thing from graph-tool just gets me the the formatting reproduced verbatim (extra '<' '>'s included) in the graph labels. Is some sort of escaping needed (or do I need to bypass some escaping graph-tool is doing) ? Thanks for any help Tim Using graph-tool 2.2.15-1 & graphviz 2.26.3-5 on Debian squeeze.