You are probably referring to the Flash Search Engine SDK (as opposed to the Flash Player SDK, which is the Flash Player source code, granted to you by Adobe if you wish to port Flash Player to a new platform), which basically is a series of command-line tools to extract texts from SWF files (which will only work if these strings actually EXIST in a flash file, which in the case of anything more advanced than a simple animation with text will not be the case).

That this website is being crawled is not a mistake nor a coding error, but an intentional attempt to escape the invisibility of Flash textual content.
1-pixel linked images with ALT tags are used to not visually interfere with the rest of the page.

The problem is that the ALT descriptions are waaay too long at the moment; the client can manage these and will be asked to tone them down.