It happens that Brian Gaff (Sofa) formulated :
I don't know what you mean. I don't hear anything wrong. Could it be a news
config issue on others machines.

The double hyphen you use, followed by a second double hyphen is
upsetting the quoting systems.

Between the body of the post and your sig, your posts contain the quite
normal double hyphen, before your sig/ before 'Brian'. The problem is
that you then have a line feed, a space, then another double hyphen, a
space, before your usual sig of 'This newsgroup posting....'.