Trailing slashes stop the redirecting

Good idea - might be worth checking if the slahes version has an alias before removing the slash and checking for an alias...

For some reason you might have:
node/50 -> /myalias1
node/50/ -> /myalias2

Not sure why though... Technically drupal URL's should never end in a slash though should they?

Fixed in 1.3...

It first does a check if the current URL has an alias - if true then redirect, if false then check if the URL ends in a slash, if true then truncate the slash off it it and check that for an alias, if true then redirect otherwise fall onto any other rules (currently just the frontpage check)