Seamonkey problem solved.
Nothing to do with Newyearspup.
Turns out that Adobe Acrobat had substituted its own links for the existing puppy libgcc ones in /usr/lib. This has been a problem for me in other puplets as well. I don't understand why, or when, it does this.
Anyway, the solution was to replace libgcc links with correct ones again. Seamonkey then started as usual.
Opening another thread for the Adobe Acrobat issue elsewhere.
Newyearspup 02 Micro, Mini, Midi, and Maxi RC10
2015 : mini 95MB Newyearspup
Nice. DO it again, restore it with new kernel but keep desktop. I am charmed (cpu get hot).
Acer aspire 1640 (2004)
Acer aspire 1640 (2004)