Recently active topics in Wuala about Wuala

Why is my connection status yellow?
If I check my connection under options then I get "Analyzing Connection...
Got answer from Ping Server A, your external adress is /x.x.x.x:7433
Got answer from Ping Server B, your external adress is /x.x.x.x:7433
/x.x.x.x:7433 accepts incoming connections.
Congratulations, your connection is suitable for trading storage!"
(I changed my IP address to x.x.x.x. There's really a number there.)
If I check my router I see that port forwarding has been set up for UDP ports 7427 and 7433, which I'm assuming Wuala setup through UPnP.
Yet, when I click the little yellow bulb in the lower left hand corner I get "There is an internet connection, but Wuala was unable to connect to the network. It can offer some functionality, but only limited upload and download capabilities."
Any idea what's going on here and how I'd fix it? I hit Crtl-Alt-X to send my details to the Wuala team.
Also, one of the reasons I'd like my status to switch to green is that I'd like my uptime ratio to improve. It's hasn't moved since I installed the program yesterday even though I've been online the whole time. I'm guessing this is because of my yellow connection status.

how do I login? I was not provide a login or password, only an invitation code. What am I missing?

I have some files that I've uploaded some time ago that I could not download now. I have just a "FAILED" error, and I see in the download window that the download stops at some point.
Maybe Wuala crashed when I uploaded these files and the upload hadn't resumed well... or the file is not completely available on the network?

So my questions is: Is there a way to check that a file is well available on the Wuala network?

What is the default sort?
As far as i can tell, its alphabetical from the name it was first uploaded with. Cause i had a file named wrong and was placed out of order but renaming it didn't reposition it.

What can be deleted for different purposes in the Data folder? Eg, if I stop trading files what can be deleted. If i have a trasaction problem can i delete all the pendingtransaction files safely? etc.

How do you make your uploads run faster?