Getting Rid Of Underlined Words

[Juergen Fenn]

Hi all,

running SuSE Linux 7.2, LyX 1.1.6fix1.

After some editing actions, copy and paste in particular, text turns 
underlined in deep blue. It does not go away. 

Is this a known bug? What can I do to get rid of it again?

TIA.

Regards,
Juergen.