If anyone was missing the little red highlight of feeds on the Safari dock icon – well here’s an uprated one that works with Safari Version 3.1.1 (5525.18).
Also works with webkit nightlies.
SafariDockStatus
The size of the unread feed count label may be controlled from the Safari menu > SafariDockStatus Preferences.
I have moved the count position towards the top of the Safari dock icon – about as far as it will go, but still allowing the count number to be scaled.
Click here 
to download, and install in your Hard Disk > Library > Application Support > SIMBL > Plugins folder.
If you need SIMBL – you can get it from here