1.   But Oliveira said other tax breaks with wider appeal could take precedence, especially since long-term tax breaks could prove problematic if the economy deteriorates.

2.   By afternoon, the surface fire was out, but the muck fire continued to spread and proved more problematic.

3.   Police conduct and management might prove more problematic.

4.   Reuniting with spouse Nancy Travis proves problematic, probably because that hunky Eric Stoltz is hanging around.

5.   The second big selling point of active management, that a fund can sidestep market drops by selling when a market starts to tumble, has also proven problematic.

6.   Longer absences have proved more problematic.

7.   Others could prove more problematic.