standards for making log entries?

Hi, been using svn for little projects here and there and so far so
good. One thing I've been wondering about it is the update log when
I commit something. Right now I just use something to the extent of
"changed formating of main page a bit". That doesn't seem all too
constructive if I wanted to create a changlog later. would it be
better to do something like:

index.php
* changed formatting when in edit mode

Or there's this other way that I've seen before that differentiated
between things like bug fixes, new additions, and something else,
maybe tweaks? so it would look something like:

index.php
+ added option to change password on main screen
- fixed bug that would send your information to microsoft
* Improved the format of the main page so it's easier to understand

or something like that. Was curious if anyone else has any system to
it (which I'd imagine so since some people use this in big companies
and stuff) or just do like my first example of "changed some stuff on
the main page" :) thanks in advance for any input on this

-- 
Todd Eddy
vrillusions@neo.rr.com
www.vrillusions.com
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