I've just installed Alfred 2 with the powerpack.
# What you were doing when the issue happened:
I checked the Features/file search/navigation/:
"Shortcuts: Use <- and -> for folder navigation"
After un-checking it, the right arrow doesn't show the action panel.
e.g.
After invoking Alfred2 I type:
[space] documents
I then down arrow once to select 'Users/dan/Documents
then the right arrow does nothing. It did, I'm sure - before I checked and then un-checked the setting described above - show the action panel. It now does nothing.
# Whether you were able to replicate it a second time by performing the same action
Yes, I can.
# Include any screenshots that might help us
The following screen shots shows the settings
http://cl.ly/image/052J0n3V151p
# Include the Alfred version & build number you are using
V2.0.3 (187)
# Include your OS X version
10.8.3