Why does eclipse/maven does not always deploy my project with last update?

Question

Here is my work environment: Eclipse Juno as IDE with maven2 plugin on it - it uses maven 3.0.4 installation from my system - and my maven web project is deployed to a remote server on an Apace Tomcat java server. (The server is in the same LAN with my machine.) Every thing works perfect, except some rare situations: it happens randomly.

Problem: At some times, when I try to redeploy my updated project to Tomcat, through tomcat-maven-plugin, the JavaScript files in the Tomcat's project directory, DO NOT change. They stay intact (even if I did changes to them), and my application has lack in behavior. No errors are reported by maven during redeployment.

Question: do you have any idea about what's happening?

N.B.

1. In the rare situations when I got that problem, I got it working finally, after rebooting the Tomcat server, deleting the Tomcat's project directory, cleaning maven installed artifact and other actions that I did - I just tried all what I could do, because I didn't have any logical clue for what happend.
2. I updated Eclipse Galileo to Eclipse Juno two days ago, and I encountered this problem in both of them. So, I think that's an issue rather related to maven not to Eclipse.

Answer 1

I found it: I wasn't right when I said that the files are not updated on the server. My problem was the browser. It loads the Javascript file from cache. So Ctrl+F5 resolved the problem.