How does "libpcre3 from testing (8.12-4)fixes it for now." point to experimental? For me it points to the version in testing.
NMU= non maintainer upload. Saying someone, who is not the package maintainer, took the changes back as emergency fix. The upload of that package was so b0rked, that this was the fastest solution.
As I wrote this during my workday in german and english, I could not be more elaborate.
greeetz
devil