I saw two instances of this when I cleared out my cache.
The other occurence was codelib_release1.swf
Is WGT trying to install an add-on without users knowledge, or is there a bug in their software.
First of all, I wouldn't let an add-on get installed without my knowledge, and what is its purpose. Since, I don't have any add-on installed to begin with.
Additional info:
I was playing a CTTH last night, a few restarts, and notice my ram utilization was up through the roof at 3.6 Gigs.