I had in my original release of kQOAuth some pieces of code in the HMAC-SHA1 implementation that used C char pointers as data arrays instead of QByteArrays (you can blame my laziness for this...). These caused issues on non-UNIX based Qt platforms like Symbian but also on Windows, of course. I have now replaced those parts with pure Qt implementations.
So now kQOAuth should run on all Qt platforms without issues! I would love to hear how this works on Symbian, since I don't own a Symbian device and can't test this myself. I could imagine the library having some use on Symbian based devices. That said, I haven't included any Symbian specific installations or compilations options since I am not familiar with Symbian either. Contributions regarding this would be more than welcomed.
For more information about kQOAuth, please visit http://www.johanpaul.com/blog/kqoauth/.