[Pharo-project] Copy from Code::Blocks on Linux

Hello all, A frequent problem I encounter: select and copy text from an editor in Code::Blocks; on pasting into Pharo, I get something other than what I copied. Any ideas what might be happening? Are there multiple clipboards on Linux? Could it be a mismatch in format? I'm using Ubuntu. I frequently work around this by pasting the code into gedit and then copying again from there, after which Pharo "sees" it. Bill