Unfortunately, KernelCheck hasn't been working for a few months do to some changes made on Kernel.org website.
But a patch has been released two days ago which fixes KernelCheck.
How to patch KernelCheck
Locate these 2 files on your computer: main.py and KernelPageParser.py and run the patching command on those two files.
If you installed from source:
KernelPageParser.py should be located in /usr/local/lib/python2.6/dist-packages/KernelCheck/
main.py should be located in /usr/local/share/kernelcheck/scripts/
If you installed from a deb:
KernelPageParser.py should be located in /usr/share/pyshared/KernelCheck/
main.py should be located in /usr/share/kernelcheck/scripts/
Using the terminal, navigate to the location of the main.py and KernelPageParser.py files (see above), copy the patch to those folders and apply the patch like so:
General patching format:
cat PATCHNAME.patch | patch -p1
Alternate method (best used with sudo):
sudopatch -p1 <PATCHNAME.patch
Thanks to AzatiPrime for letting us know about the KernelCheck patch. Hopefully a new Kernel will help some people...
Update: KernelCheck stopped working again. See this post for a patch (.deb): KernelCheck Fixed .Deb Download [Ubuntu / Debian]