I've got the latest builds of FSOpen (both the 3.5.5 and the 1_20_2004 builds) and of the launcher. In having run the launcher and ticking the necessary command lines parameters, I get the following debug message running the 3.5.5 build:
Error: Unrecogzined command line parameter -htl
File:E:\Languages\Visual Studio Projects\Visual C++\fs2_open\code\Cmdline\cmdline.cpp
Line: 540
Call stack:
------------------------------------------------------------------
kernel32.dll 77e7eb69()
------------------------------------------------------------------
Replace the "-htl" with -spec, -jpegtga and -glow, as well. I get similar messages running the 1_20 build, just without the debug information and only on -glow and -spec.
Anyone got any ideas?