Hey, I'm no pro and learned things by studying them in production environment where each mistake meant loss.
But i think i have that test and trial bug, and a drive towards all this that helps.
Anyway, the problem is easy to replicate.
1. Go to sh404sef page under components in administrator panel.
2. search for "Click here to switch to extended display (with all available parameters)" and click the link. This will display the advanced options in sh404SEF Configuration.
3. Go to "sh404SEF Configuration".
4. There will be a tab that says "Advanced". Click it.
5. Activate the very first option under "Cache management" to activate cache.
Sidenote: I have SH404SEF extended mode enabled in master and slaves. This problem has a temporary fix i.e. don't use cache. But it puts drain on system resources.
I hope now you can get things going... While i don't use all the features of SH404sef, others might and you can test things in extended mode to see what all sh404sef does or you can wait for someone to report issues and then correct it.
But i would really appreciate if you can give a quick fix for the current issue before next release.
One more thing... when you test things always enable advanced modes to understand all the features.
Thanks