I'm not sure how things were in 7.0.4 but as far as I remember everything was good and fine - but now after upgrading my tooltip is empty, the temperatures are blank for the upcoming days in both the 'Now' and 'Daily' screens and the date observed is not formatted correctly...
Do anyone have a plausible explanation or possibly even a solution, or is it all just skin files that needs to be fixed? I haven't looked at it at all, as it's getting kinda late, but if it's just skin files it shouldn't be that big a deal and I'll probably fix it myself in a couple of days

Which weather station are you using?

I'm sorry, I should have specified some details better

My station is (just search for 'copenhagen, denmark'):
Station Name: Holte
Location: København, undefined
Data Source: PWS (WUnderground)

I upgraded to 7.0.12 today but that didn't really take care of the problems I were seeing, except for giving me a sunny icon in the tray tooltip.

But just now (after flipping between stations, and in particular after switching to a WeatherBug station) the tray tooltip and some other small stuff are fully working again, so I guess it might have been some bad cache or something like that?
But still there is no temp (hi/lo) data on the 'now' and 'daily' screens when I'm on WUnderground station, and using a WUnderground PWS the update progressbar is in the upper left corner - even after clearing the cache and trying over and over...

And to end with, the observed and downloaded dates looks like this:
Observed: --July-27-2010 @ 12:20:00
Downloaded: 27-07-2010 @ 12:29:12

I just released a new Weather Watcher Live 7 update with a fix for this issue. Right-click the Weather Watcher Live system tray and choose "Check for New Version" to download the update.