We compile the software ourself, latest update 1206 give this for the 32bit version.
Both 32 and 64bit version have the same src.
Tested al files seperete and non has this issue
Only if i combine 2 files (vncviewer.exe and winvnc.exe) in an exe or a zip the 32bit version give this error.
It's the ultravnc 1206 X86 setup found on our download page
that give this error.