@Siropu : Found a bug in 1.8.0 that was not present in 1.7.2:
If a username is identical to a linked Keyword and a posting of this user is quoted the posting looks fine directly after saving (but is still missing linking the keyword):
but on the next view (by another forum user or simply a reload) the keyword is linked (as it should) but unfortunately the quoted username as well and it looks like that:
I tested it with 1.7.2 as well and there everything works as it should.