Technology is not behaving at Rosam Towers

Since returning from holiday a couple of weeks ago the digital world has been ganging up on me. First off, after installing gracefully on to my 2010-generation MacBook Air with just 2GB RAM, OS X Lion has been giving problems on my iMac. With a processor running nearly twice as fast as the Air and six times as much RAM, the Lionised iMac has been crawling from time to time and crashed three times over one 24-hour period. OS X gone all Windows 98 on me? Then my Drobo went all wobbly when I replaced one of the disks for...