[false+] Wings 2.1.5 won't load files: "Read failed: corrupt Wings file" (Linux)

[Loci]

I'm having the same problem and investigated a bit. It seems that wings has a problems above a certain level of complexity.

I can reproduce the error as follows:
New file, create a torus with x sections and y slices. Save the file. Open the file or Revert.
x=90, y=20 => ok
x=91, y=20 => error

Versions:
System: Gentoo Linux + KDE
NVidia drivers 381.22
wings 2.1.5
erlang 19.1
cl 1.2.3
libsdl 1.2.15