If you updated your Plasma in the last 24-48 hours and got a HUUUUUUUUGE panel that painted at the top of your screen .... know that you were not alone. =) There was a small accident, as sometimes happens in the dev branch, leading to the battery widget growing a little .. uhm .. large and dragging other widgets in the panel with it as it did so.
You may have also noticed our fun new taskbar, complete with its own cute ways of crashing.
Both issues are fixed in svn but I've seen a few people mention it on IRC, emails and blogs (thankfully all with understanding and patience =), so I figured it was worthwhile to let everyone know ...
The root cause of the problem, in case you're at all interested, was that we merged a ton of new code into trunk, including a new taskbar and new system tray implementation among many other things, and it took a day or so to stabilize. It sucks doing it in trunk where everyone following trunk can get bitten by it. I feel we need to adjust our workflow in this regard a bit (specifically where in svn we do integration work), but that won't happen before 4.2.0 is out as we're already too busy to push something as disruptive as that on ourselves right now. We're focused on making 4.2.0 rock, which is a big enough task as it is ;)