You won't find more bugs in the Cacko of a SL-C3200 than in the one of a SL-C3100.
If you want/need to overclock, the best thing to do is to stay away of frequencies other than XXX/208/104, so your options are:
624/208/104
520/208/104
412/208/104 (Regular)
208/208/104 (Power Saving)
All those work pretty well here.
Another thing is your Opera browser. I use it everyday for two months and never found a problem with 7.55 (which others say is buggy).
About install... you could run the apps with the console, but if they don't install correctly and create an icon in the "apps" tab (or whatever other), maybe you're installing something not for your zaurus model/distro. Check it to be sure. Uninstall and reinstall the app also works sometimes. Also, read the description on the package you're installing, just in case it needs additional ipks (dependencies) in order to work.
Good luck