Johniedino: Happens every rd. and any shot.
But what can you say its "a computer problem"
Yeah, it very well could be. I happen to be currently testing the Avast! Home anti-virus software. This software installs a nice little icon, a small blue ball with the letter a inscribed on it, in your Windows tray area. The interesting thing about this icon, this little a is, that it starts spinning whenever the anti-virus software is doing something on the PC.
Johniedino, you'd be shocked to see how frequently the anti-virus software becomes active. At seemingly illogical moments! I see the small a spinning approximately once a minute, at irregular intervals. Most antivirus software packages monitor all your HTTP traffic by default (i.e. what happens in your browsers).
I kept watching the little anti-virus icon while I was my playing my last few WGT golf games. Yep, that's exactly what was happening: during the game, the icon was sometimes spinning, and sometimes it wasn't. It was probably spinning whenever WGT's game was downloading, in background, more components necessary to display the course I was playing.
Now, Avast seems to be good-quality anti-virus software, and I didn't think it was disturbing my swing meter. (And I happen to be currently playing on an old notebook with only 512MB of RAM, yet the game on this site is performing fine for me; in contrast, I couldn't make a single shot over on TWO when I tried it earlier today – the shot meter kept freezing all the time.)
What I mean to say by all this: there is a lot more happening on your computer, at any moment, than readily meets the eye. Every time your shot meter stutters, this can actually be caused by a background process running or being launched on your computer, without you realizing it, such as anti-virus software starting to check something (for example, WGT courses components being downloaded in the background). Not all anti-virus software is so delicate as not to disturb your swing meter; some anti-virus software might be pretty heavy-handed and aggressive.
My best advice therefore: just let the meter pass all the way to the right without clicking the mouse, then take another swing. I find that the meter rarely stutters on several successive repeated swings. Also, make sure always to close the original browser window from which you launched the game pop-up window; an aggressive ad being loaded in the background, or your Friends panel being updated in the background, could very well cause meter stutter.