After a few last minute bug fixes and changes, I put the last finishing touches on Sketch 0.6.6 today and released it. I had some problems with the web-page update because SourceForge wouldn't let me log in. A few hours later it worked again, though.
A couple of days ago, Martin Weber contacted me about adding color support to the output filters for the next release of AutoTrace, so modified the svg, sk and eps/ai filters accordingly. It took just a few lines.
He also asked me to look for memory leaks and as it turns out the situation is awful. On one particular image, autotrace makes 1 452 546 mallocs, but only 290 458 frees. Most of the leaks are hard to find because of inconsistent use of malloced vs. automatic variables and strange data-structures, e.g. there's an array of structs that also seems to be a linked list.
This isn't Martin's fault, however, because these leaks are already present in limn, a part of the GNU fontutils on which autotrace is based. I gave him the advice to reimplement the algorithm from scratch. That seems to be the sanest solution.
That's the title of an article in the current issue of c't. It contains reports from Intel's Computing Continuum Conference and Hofstadter's Spiritual Robots Symposium. I had read about Hofstadter's April 1st event on Slashdot, but the Intel one was new to me.
Especially noteworthy for me as a python-fan is that among such luminaries as Bill Joy and Hans Moravec it also mentions Guido van Rossum and his Computer Programming for Everybody.