Steps to reproduce:

1. Create an item of type log, as active check towards a solaris agent ( release 11 on sparc at least ) 
   
2. write some lines to to log file ( echo "test" >> /tmp/test.log )
3. wait for results 

Result:

Nothing is returned

Nothing is in the log file ( eventually some config error ), either on server than on agent.
This item works perfectly on a Linux machine.
Also at Debug 4 can't get any info.

Expected:

To get lines written to the file reported to the history of  the item .