Hi, I'm Jan Kundrat, the upstream developer of Trojita. First of all, it's pretty cool to see people interested in the project, not only those which are working on Maemo-specific GUI, but also those who gave Trojita a try on their phones.

I do not build Maemo packages myself, that's "vrwarp"'s work, so I can't comment on them being optified or not. Locations for cache and configuration files are those provided by the Qt framework. If there's any issue with them, please file a bug for the Qt library, we as application developers have no choice but to trust that they are indeed sensible values.

Finally, please remember that Trojita is pretty much work in progress at this point. I'm reasonably sure it won't eat your mail, but it isn't intended for "real world use" just yet. I'm of course happy if you play with it and share your impressions about the project, so have fun!