>>>> My changes so far were really minor and I didn't add new files to the solution.
>>>>>
>>>>>Do you have ideas of solving it?
>>>>
>>>>The suggestion to raise the level of the 'output verbosity' (lovely phrase) should identify the conflict....
>>>
>>>From this http://forums.asp.net/t/1074232.aspx looks like I should try build in the command prompt (so far I was always do it in IDE).
>>
>>I found that thread confusing. AFAIK setting the verbosity in VS or using the command line switch results in the same behaviour.....
>
>How can I build the solution from the command line switch?

http://msdn2.microsoft.com/en-us/library/ms164311.aspx. I think the property switch is /verbosity:diag. But you'll only get the same results as when setting it in the VS IDE.
Regards,
Viv