SigViewer trunk crashes reproducible in libbiosig trunk sopen() opening MIT-BIH hea files.
1. Make debug build of libbiosig.so and SigViewer using the attached patches (and possibly more manual override tricks I forgot to document since QT4 debug config support seems broken in debian squeeze, or broken qmake project config *.pro)
2. Compile+Link SigViever NOT against ./extern but against the /usr installed trunk debug libbiosig.so and headers
3. Launch SigViewer and open a MIT-BIH hea file from the File->Open GUI-dialog, should segfault in libbiosig->sopen(), see attached gdb output.