SILENTW  I'm a web designer/developer and have used Flash Optimizer many times to reduce the file size of SWF's to get them where I need to be. Sometimes i only have bitmap images to work with or have complex vector graphics to build animations for banner ads. I can usually get the size down utilizing other tricks. But, then sometimes, I need to squeak out another 2, 10 or even 20K out of a file size to get it to meet banner requirements for placement. Sometimes that small banner size limit is harsh! Flash optimizer does the trick. While there is usually some play to manage how the file is reduced, you can tweak many different aspects to manage what part of the SWF is affected. While it's not something everybody will use, if you work in an agency or on your own to produce SWF banner ads that have to meet a tiny file size requirement to be placed, Flash Optimizer will do the trick.

The biggest con about the ap is it may take a bit of practice to understand what settings to tweak to get the file to reduce the parts you don't mind and maintain the parts you do. Even then, it has come in quite handy to have in my toolbox of applications.   
(Version 2.3.29.3696)

RT IDEAS  I tried the demo and hoped for better results out of the gate. It had minimal effect size-wise on a 9MB file--9.07MB down to 9.02MB-- a 0.5% reduction. Invisible buttons (with Glow filter) became black objects obscuring the graphics below. Text that was converted to outlines became blobby.

Trying some settings changes, I was able to drop the 9MB file down to 4.6MB, but that seemed mostly due to sound compression. It still had the graphic anomalies above.

I can tweak sound externally for similar results.

According to their site, the $99 version is for personal use only. To use it commercially, you need to purchase the $299 version--actually worth it to me if it worked out of the box and significantly reduced my bandwidth for my larger projects and less time having to tweak my work.

I see potential, but no use for me at this time.

I started programming with 3.5k of usable memory on my VIC-20. The MU logo on this page is 4.8k. Optimization is always in my thoughts.  
(Version 2.3.29.3696)

MAC-HAMSTER  Flash Optimizer is one of my favorites. Well, I get mishaps sometimes with it, but having tuned the settings a little, I always get pretty good results.   
(Version 2.0.22.3595)

AL_GIOVANNI  I think there's a serious issue here. Far from "optimizing" my SWF, it actually *increased* the file size by almost 40%.

See for yourself:

http://img448.imageshack.us/img448/990/optimizefails4mt.gif

No offense, but this isn't much incentive to shell out $100! Flash Optimizer seemed to be the only app on MU that offered SWF compression, so I was optimistic.

So what's up here, Eltima?  
(Version 1.0)

ANONYMOUS  So how does this compare with what Macromedia (now Adobe) offers? Is the input a .swf or .fla file?   
(Version 1.0)