marble mouse middle click fail in 12.04

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http://askubuntu.com – On recently upgrading to 12.04, I find that the middle click with my logictec marble mouse doesn't work any more (formally achieved by clicking both buttons). Anoying since I can't do a middle-click paste. Can anyone think of an easy solution? Or should I file a bug? (theres's already a launchpad question on this, and here's the oldish ubuntu page for configuring a marble mouse. (HowTos)