Some pages report regressions since the merge of the first set of red link patches - for a short list:
enwiki:Hull_to_Scarborough_Line
dewiki:Frédéric Mistral
eswiki:Agustín_Jose_Donado
enwiki:Serreer
viwiki:Quan hệ tình dục
frwiki:Prononciation_de_l'hébreu
enwiki:State religion
There's at least an instance of a link getting rt'd to [[Springhead locomotive works?action=edit&redlink=1|Springhead locomotive works]] (instead of [[Springhead locomotive works]]).
It *might* have something to do with Cite processing - to be investigated anyway. Can't reproduce things out of the rt-testing context yet.