I recently upgraded my systems to Kubuntu 9.10 and when I plug in my Treo 755p to charge, it keeps rebooting over and over.

The fix is simple. Add the following line to /etc/modprobe.d/blacklist.conf:
blacklist visor

and reboot...

We were having a little problem on our webservers with php5-memcache when we try to utilize multiple memcached servers. The error was:
ALERT - canary mismatch on efree() - heap overflow detected (attacker '10.X.X.X', file '/path/to/file/index.php')
It didn't come up too frequently in the logs, but it was frequent enough to cause some concern.

As part of troubleshooting, I was tasked with upgrading php5-memcache on one of our test systems so that we could see if this resolved the issue. This turned out to be much easier than I thought. Here's what I did (as root):

apt-get install php5-dev
cp /usr/lib/php5/20060613+lfs/memcache.so /usr/lib/php5/20060613+lfs/memcache.so.bak
pecl install memcache-3.0.3
/etc/init.d/apache2 restart


That was it, we're running on 3.0.3 now and I'm crossing my fingers that resolves the issue we're seeing.

To help you get the most out of (K)ubuntu, be sure to enable Medibuntu as a source for packages. This will allow you to easily play those wmv files and DVDs on Linux as well as most other multimedia that use proprietary formats.

The steps for setting it up involve running three commands (Details here)
For me, it was a matter of running:
sudo wget http://www.medibuntu.org/sources.list.d/hardy.list -O /etc/apt/sources.list.d/medibuntu.list
sudo apt-get update && sudo apt-get install medibuntu-keyring && sudo apt-get update
sudo sed -e 's/ non-free//' -i /etc/apt/sources.list.d/medibuntu.list

Good luck!