when posting in a manga's page

This happened before, but only if the page is from another site beside managago (and also baka-updates)

That is also what I suspected after my other replies going normally. Thanks for confirming :)

Ah, don't worry about it like Merry said. This site has a spamming filter which prevents posting of links unless they belong to a domain which is allowed in the exceptions' list like facebook or youtube. Usually your comments ought to appear later on when they are approved by the admin or moderator/s. However from now on if you want to post links to other websites remove the http:// or https:// part, like this:

static.guim.co.uk/sys-images/Guardian/Pix/pictures/2010/11/12/1289584382526/Humor-scarf-005.jpg

I thought that I figured out a good trick to post a link to an outside website. I was going to show you how but my trick didn't work because my previous comment got blocked lol

Hence it is basically like Merry said. It seems that there is no way to outsmart the spamming filter which is a good thing because this filter is meant to prevent excessive publications by spybots ╮(￣▽￣)╭
Of course inoffensive links like yours and mine get blocked to (￣∇￣")