Oops. Too hair trigger on the send button. Deleting the
> cache worked. But why? I saw the problem the first time I
> ran his example. What exactly is being cached?
We run a md5 hash on the tex string itself and use that for the base
filename of the cache. The tex , dvi and png files are cached. I am
not sure why you needed to delete the cache on this one. If you can
replicate the problem, perhaps you can take a look at texmanager.py
and see what is going wrong. The module is fairly straigtforward.