EE Plugin Conditional

gistfile1.html

{exp:my_plugin}
	{!-- This conditional works --}
	{if some_thing}
		{some_thing}
	{/if}
	
	{!-- This one never works --}
	{if other_things}
		<ul>
			{other_things}
				<li>
					{item}
				</li>
			{/other_things}
		</ul>
	{/if}
{/exp:my_plugin}