FSR 4.1.35 is up on the nexus. http://www.nexusmods.com/fallout3/mods/8886/
Probably the most significant thing about this one is that heap replacement now seems to be working on FO3. It's still off by default, for the same reasons it's off by default on Oblivion and FNV, but I'd recommend turning it on.
A number of other things changed too, though it's not entirely clear if they are improvements. FPS management was rewritten from scratch. The 64 Hertz fix was rewritten, and now supports much more fiddling from the ini in hopes of allowing any side effects of it to be worked around (the IronSights incompatibility might be a 64 Hz side effect, not sure, ought to test it sometime). LCS hooks were rewritten from scratch. Hashtable profiling was rewritten from scratch. Probably other stuff too.