This is a test of the attachment system. If this was an actual new clothings product post, there would be an ad for a new clothing product here, instead of a message explaining that it's only a test.
I got the "There seems to have been a slight problem with the SL Forums database." error too.
Upon seeing it displayed on the screen, it does seem like I've seen this error.
That's one reason to provide a screen shot of error conditions instead of just pasting the text of the error message. A screen shot is more likely to jog the memory of someone trying to figure out what's going on.
The "There seems to have been a slight problem with the SL Forums database." is one produced by the vBulletin forum when it has trouble accessing a forum's MySQL database. At least that's what it's supposed to be.
If you are unable to add attachments here, or if you are, please post about it in the Resident Answers forum, including such things as what browser, what type file, etc.
If you are unable to add attachments in this forum or other new products forums, and get the "There seems to have been a slight problem with the SL Forums database." message, what happens you take the email link offered in the error message? Do you get a response?
I suppose a Jira should be filed about it.