I noticed this problem too. Then again, I use Links2 very rarely, so it doesn't really bother me.
After noticing the bug, I uninstalled Links2 and then I installed the older version of Links2 from the stable repository. Then I tagged Links2 not to be upgraded in aptitude (I do all my package management with aptitude).
If you want to see the Links2 problem fixed, maybe you should consider reporting it to the package maintainer via Debian's bug tracking system?
EDIT:
I decided to rebuild links2 according to these instructions:
http://www.debian-administration.org/articles/20
Now links2 works just like it used to before the upgrade.