Hi - I'm not sure if this is a bug in Ketarin, .NET, a fault of the web dev of the site, or a bit of none/all of the above.
On the download page of the encryption software VeraCrypt, the link to the download has an encoded "+" character in the HTML, showing up as "+". Firefox decodes this automagically and the link works, but Ketarin requests the URL as-is.
The offending line in the page is as follows:
<a href="https://launchpad.net/veracrypt/trunk/1.21/+download/VeraCrypt%20Setup%201.21.exe">
Requesting this via Ketarin gets a 404, the same with cURL. I assume the web server is seeing the "#" and assuming it's part of a document anchor. Or something else weird. Either way I'm not sure where the fault lies but I'm erring towards the site being "less incorrect" :-)
For the moment I've just split the URL variable into two parts but figured I'd report this in case it is a bug in Ketarin.