[SOGo] Tasks color on Ubuntu

[Alessio Fattorini]

Sorry for question regard lightning, but in Ubuntu Lucid theme Ambience (default), tasks list is 
unusable. The color is white over white, i can't read and use anything. I must change theme in 
Radiance for use it, it's not a great solution :-|
Can anyone help me? Can i change lightning css?
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