I recently found some odd things in the gallery section of this site, I've noticed that if you fill in the album password field on the "Update Album" page you album might get set to private or comments might get disabled.
Normally this isn't a problem since you can just avoid to password box when editing you albums but if you're using a browser that saves your GoL login and password and fills them in for you when you login such as Firefox the browser will automatically fill in the album password for you, which will make the album private or possibly disable commenting without you knowing.
One workaround I found to this issue is to blank out the album password box on the bottom of the page before you press "Update Album" when you're editing your albums:
Note: If you do accidentally set your album private, you'll have to contact a admin to fix it for you, blanking the password field might not work in this case
Note 2: this is NOT a issue with GoL it's a COPPERMINE issue, I've had this problem on other sites that use Coppermine such as L-G
Another interesting thing I've noticed is that the email notifications for picture comments will change languages depending on what the commentor's default language is, I once got a notification email in French
I pointed this out so people here can prevent accidentially setting their albums to private, it's not really a big issue though. I'm just kinda throwing this out there.