Originally Posted by eubillie
... but if I double click the .rpm file, I get a query asking if I wish to install the browser in question, then it asks for my password. Then it tells me that I must download 10 other files. Then it resolves dependencies, and a few seconds later I get the message,"KDEinit could not launch usr/bin/apper."
So, you are doing the wrong thing, you are trying to use Linux
like it was Windows and the end result is that the system nearly manages to stop you doing anything stupid and it nearly manages to work in spite of what you have done.
To do this correctly, go into 'install and remove applications' (name might be slightly different depending on which GUI you use), it will ask you for the root password, click on the application that you want to install and it will sort the problem out for you. There should be a very low risk of getting apps and libraries that don't match, so if you don't have a good of what you are doing, just stick to the approved way of installing things.
Don't try downloading individual rpm files, unless you know what you are doing, what the risks and the extent to which you are overriding the system's measures to protect you. It is safer and easier to manage in the long term.