The license agreement dialog is skipped at the beginning of installation.

It's probably caused by this:

2007-08-16 03:43:52 <1> 10.20.4.20(3377) [YCP] ProductLicense.ycp:248 Searching for licenses...                                
2007-08-16 03:43:52 <1> 10.20.4.20(3377) [YCP] ProductLicense.ycp:259 Getting license info from repository nil                 
2007-08-16 03:43:52 <1> 10.20.4.20(3377) [wfm] ProductLicense.ycp:261 Pkg Builtin called: SourceProvideOptionalFile            
2007-08-16 03:43:52 <3> 10.20.4.20(3377) [wfm] PkgBuiltinCalls.h(evaluateCall):115 ERROR: Parameter 1 is nil, Integer is requir
ed                                                                                                                             
2007-08-16 03:43:52 <1> 10.20.4.20(3377) [wfm] ProductLicense.ycp:266 Pkg Builtin called: SourceProvideDirectory               
2007-08-16 03:43:52 <3> 10.20.4.20(3377) [wfm] PkgBuiltinCalls.h(evaluateCall):117 ERROR: Parameter 1 is nil, Integer is requir
ed                                                                                                                             
2007-08-16 03:43:52 <1> 10.20.4.20(3377) [YCP] ProductLicense.ycp:277 Licenses in /media.1/license/... not supported           
2007-08-16 03:43:52 <1> 10.20.4.20(3377) [wfm] ProductLicense.ycp:283 Pkg Builtin called: SourceProvideOptionalFile            
2007-08-16 03:43:52 <3> 10.20.4.20(3377) [wfm] PkgBuiltinCalls.h(evaluateCall):115 ERROR: Parameter 1 is nil, Integer is requir
ed                                                                                                                             
2007-08-16 03:43:52 <1> 10.20.4.20(3377) [YCP] ProductLicense.ycp:287 No license present

'nil' is used instead of a valid source ID.