I just fixed the exact issue posted by Buck Anderson above. It seems after installing and configuring UVG 2.0 it added a few entries to the web.config for neatupload. The configuration wizard attempts to get the settings right but seems to have missed one attribute on the <neatupload> element but it was sort of explained in the configuration wizard. Anyway, here's the sections in my web.config that are necessary:
<httpRuntime useFullyQualifiedRedirectUrl="true" maxRequestLength="65536" requestLengthDiskThreshold="8192" executionTimeout="1920" />
The above is just like everyone else's and works fine. Unless of course you have the UVG or some other uploader installed. For the UVG neatupload the following is what mine now looks like.
<neatUpload useHttpModule="true" maxRequestLength="65536" maxNormalRequestLength="65536" defaultProvider="FilesystemUploadStorageProvider">
Note that the maxNormalRequestLength was not in my web.config entry. I manually added it and now can upload large files again (I was being restricted to 4mb).
Ted