I poked around some in news.arc from the download on arclanguage.org; it looks like the newscache macro does quite a lot of heavy lifting... I recall reading someone having some weird issue with the way w/uniq's gensym works (vs. mzscheme's) - is it possible some change has been made to that functionality in the past month or two?

Unless of course Patrick is generating requests that perform functionality, like logging in, up/down voting etc... Then the idea is totally moot since you'd be hitting a much larger cross-section of functionality.

I don't really know Arc and it's intimidating making suggestions knowing the caliber of people looking at the issue; but I figured sometimes an opinion from someone who isn't intimately familiar with the code can be at least a little helpful. If not, feel free to ignore this post completely =D