Since you're doing well in terms of workload, I'd suggest using the extra time to learn new things. Use emacs? Learn vim. Use vim? Learn emacs. Don't use either one? Learn both. Any skills you need that could be preventing you from getting your dream job? Learn them.
Seriously, this works as long as your job situation is only temporary. If you force yourself to use the new things you're learning you can also draw your projects out a little bit more so that you're not spending all day browsing HN (or whatever else you read) and you look busier (which is what's really important to PHBs).
I second this enthusiastically. If the workload is not taxing for you, instead of finding things to fill your spare time, just do the things you have to do as "inefficiently" as possible. One of the barriers to trying new things is the drop in efficiency (like switching to a new editor, as per the suggestion before). If you can take the productivity hit, this can be a great opportunity. Frustrated by a lack of feature in the editor? Rather than work around it, fix it and submit a patch. Keep using KDE (or whatever) but switch your locale to French. If you don't already and you are allowed to do so, switch your version control to git - that should mess with your mind for a good while :-)
Basically if you genuinely can't leave, just try and make it interesting for yourself and make a habit of stepping outside your comfort zone - otherwise your brain will rot.
The other issue is your actual project. If you have scope, overspec it. Only you will know, but that should give you back some pride in your work. If you are taking shortcuts, don't. If you are not commenting and documenting properly, do. If you can make the code faster, speed it up. If you can deliver knobs and whistles, go for it.
Seriously, this works as long as your job situation is only temporary. If you force yourself to use the new things you're learning you can also draw your projects out a little bit more so that you're not spending all day browsing HN (or whatever else you read) and you look busier (which is what's really important to PHBs).