It works for me:
tc@box:~$ echo `version` && aria2c http://www.google.com/index.html
tinycore_2.0alpha4
2009-04-24 23:02:09.551139 NOTICE - File already exists. Renamed to ./index.html.1.
2009-04-24 23:02:09.608327 NOTICE - Download complete: ./index.html.1
Download Results:
gid|stat|avg speed |path/URI
===+====+===========+==========================================================
1| OK| n/a|./index.html.1
Status Legend:
(OK):download completed.
tc@box:~$