I'm wondering what version of ClickToFlash does everyone use as their are several version of this app from several venders. Can I assume most use the original ClickToFlash?
I recommend using
Plugin Customs because this extension provides ClickToFlash functionality to all browser plugins, such as Flash, Silverlight, Java, & etc. Providing control of Java is important for security (i.e. Boonana) if you need Java to use some websites and, therefore, can not disable it in the browser preferences.
However, I really don't use Safari anymore. It's just not secure and even with the Extensions available under 10.5 and later, they just don't compare one bit to what's available for Firefox (or Namaroka, a PPC-optimized FF build that I use).
The security issues within Safari relate to components that allow the usage of third party elements within Safari, such as Flash, JavaScript, Java, PDF support (via Preview), & etc. Any browser installed into Mac OS X relies on the same components to provide the same functionality so Firefox has many of the same problems as Safari. Webkit, without these components, has very few vulnerabilities but providing these functionalities is unavoidable to fully use the web.
Actually, Firefox's extensions are not sandboxed while Safari extensions are sandboxed to make them more secure. The Firefox extension gallery had two incidents where it contained extensions that were malware. The sandboxing of Safari extensions does limit their functionality to promote security. Safari users that want some features, such as
Safari Cookies, have to resort to SIMBL based plugins to modify the behaviour of the browser to the same extent that can be done with Firefox extensions.
I've switched from the ClickToFlash plugin (clicktoflash.com) to the Safari extension (linked above, long URL) - it's much more recently updated and has a few extra features.
Also, the ClickToFlash plugin uses SIMBL which can cause Safari to become unstable after updates.
Obviously, personal preference will determine what each individual decides best meets their needs.