I have a bunch of AppleScripts that follow a similar pattern: they take the current clipboard contents, turn it into a URL to an intranet server, and then use "open location" to go to the URL. In addition, some of them pop up a dialogue to ask for additional info that gets merged into the URL.
These scripts worked fine when I was running Leopard and FS 2.3.6. I recently upgraded to Snow Leopard, and noticed that when the scripts pop up a dialogue, it wasn't brought to the front. I had to hide all windows to find it.
Upgrading to FS 2.5 fixed that problem, but now when those scripts open the location, Safari doesn't pop to the front. I have to switch to it manually. This only happens with the scripts that display a dialogue.
tell application "Safari" to activate
to the end of the script seems to solve the problem, but it would be nice if I didn't have to do this in all the scripts.