[BUG] Submitting a new post doesn't work after first try returned an error

[Toolwut]

Sorry don't know how to call this. How to reproduce:

Start new post
Attach a non-supported file type (or probably something else like exceeding the file size limit)
Hit submit
Get an error
Go back
Fix and try posting again -> nothing will happen

Unfortunately means that you have to reload and attach all the files again. I think I already experienced this before the forum migration ..

[jitspoe]

I was really hoping to use SMF 2.1 for the upgrade, but it's not quite done yet.  While supposedly a release candidate, it still has a number of issues (one being half of the old attachments didn't work).  The attachment system on there is a lot better -- you can drag and drop files and upload them individually rather than having to submit the post before finding out there are problems with the upload.  2.0 doesn't seem that different from 1.1, to be honest, other than the fact that it's not compatible with the old theme.