Hello Berzerk Contempo,
I've encountered the very same problem.
It is almost as if there is a setting which needs to be applied which forces a rotation to only go in one direction, otherwise the symbol being rotated swill simply default to the direction of rotation requiring the least movement. Assuming the top of the symbol is 0 degrees, if we want it to go 180 degrees, it goes clockwise, but if the final point of rotation is 270 degrees (clockwise) then Flash simply makes the symbol rotate 90 degrees counter clockwise.
Did you every find a method to resolve the puzzle?
Thanks for writing back. No, I have not found anyone but you to even respond to my query. So much for the helpfulness of Adobe's much touted forums website.
Yes, you have articulated the problem nicely. This is exactly the trouble I am having with the 3-D tool!!! I've tried creating in-between key frames to help guide the correct/desired rotational movement, but even with these key frames, the motion-tween invariably "glitches" the rotation animation back to link to the original key pose the wrong way. I've tried full rotation of both type and objects via various axis, and this problem always surfaces. Seems like such a simple thing to tween for the 3-D tool. But my Flash CS5 is not up to the task, apparently, --and neither it seems are Flash Adobe Forum readers.
It's so sad that Flash is treated by Adobe like such a ******* child. Once Adobe's brand was synonymous with workhorse programming, and the integrity to fix what was wrong with a program quickly to make it better. But most of my professional colleagues warned me to stay away from BOTH Flash CS3 and CS4 because of their unreliability issues!!! What a sad state of affairs for Flash. Cartoon animators like me are crying out for a program which does what Flash does, minus the crashes, glitches, unreliability, and counter-intuitive user interface Flash has become infamous for. Industry wide, Adobe has gained the reputation of having turned its back on the animation community, because "there are not enough of us to matter monetarily." And so, by extension, it has left itself and it's ailing Flash program ripe for being bested by some hungry developers with the concern and the attention to give to perfecting a 2-D animation software program which actually delivers what it promises.
I keep clicking the "software update" button in my Flash program, thinking Adobe's next update will actually improve its performance. Dream on...
I did get something working yesterday, but it was not flawless.
I took a symbol and turned it clockwise 180 degrees in the first tween, then turned it clockwise 180 again in a second tween.
As in, within the first 4 frames it turns clockwise 180 degrees.
Then in the next 4 frames the upside down image turns 180 degrees clockwise.
I had to ensure the "object" was a symbol being tweened.
Previously I was attempting to do it in a different way.
I cannot actually remember how I was trying to perform the effect previously.
Check out Paul Burnett's video on this page which addresses the issue. He addresses exactly the problem you describe in one of his first examples: