I am thinking of upgrading from 10.04 to 12.04, just a click away in the software centre (no particular reason other than to benefit from recent fixes and continued support).
There are probably no easy answers (though I'd like some brief ones), but I wonder how common soft/hardware in/compatibility related problems are, resulting from such an upgrade?
Also, I am assuming all custom configurations will remain unchanged after such an upgrade (default email and custom settings, www browser bookmarks, various .rc files, repository settings for auto upgrades of unsupported software, and such), please correct me if should not assume so.