I can browse the following project without any issues from Firefox/internet explorer,

https://hg.codeplex.com/oxyplot

But, using the TortoiseHG version 2.4.2 client, I am unable to clone the repository. Here are the steps I followed to configure the proxy settings,

1. Open up the TortoiseHg Workbench
2. Select File > Settings
3. Press button 'Edit File' near the top-right to open file editor

And in the file I added these line

[http_proxy]
host = 111.11.11.11:80
user = xxxxxxx
passwd = xxxxxxx

Now, when I try to checkout I'm getting the following error message,

SSL error: unknown protocol

Does anyone have any ideas on what I could try next? I'm doing my thesis and the university proxy does not seem to co-operate with me. :(

-chronodekar

Found a solution myself after a day of frustration. For more details check here,

http://stackoverflow.com/questions/11449133/how-to-clone-a-codeplex-mercurial-repository-behind-a-proxy

-chronodekar