@dave r said:

... you might look at the OpenGL settings and compare them between versions. ...

All three OpenGL options are checked in v8. Only hardware acceleration and fast feedback are checked in 2013. Box might have the answer for my situation. I'll see if that works, then change the OpenGL settings.

Thanks!

@box said:

Let me guess, you have a Logitech mouse. ...

Excellent guess, Box! I have a wireless M510.

I'm familiar with the settings of which you speak. I went in just now and un-clicked the 'Smooth Scroll' button. Unfortunately, I can't tell you if that change worked for me until I play with my drawings in SU2013 a bit more. Before I made the change, I opened several drawings in SU2013 to confirm the zoom-zoom was still occurring. You guessed it! No super zoom, which is what I saw before. At times, I could open a drawing and have normal zoom. Then, after having the drawing open a bit, zoom went wild.

Thanks for your input. I'll let you know if my problem comes up again.

I’ve been using SketchUp for a while, moving from v6 to v7 to v8, and upgraded to SU2013 several weeks ago. I had not noticed any problems – until now. Suddenly, it has started behaving strangely when I want to zoom an object. It seems that one click of the mouse wheel is very sensitive and either brings an object too close or makes it too far away. I can open a model in SU8 that was created in SU8 and the zoom works normally. If I open the same model in SU2013, the zoom is crazy.

Incidentally, anything I created in SU8 is being kept as an SU8 model for now.

Has anyone else seen this issue?

Does anyone have an idea what I should look for? All of my mouse settings appear normal.