internet explorer problems

Hi,
I seldom have problems concerning viewing my website on mac browsers(safari, firefox), but I get feedbacks from windows users using internet explorer that some images don't display, and sometimes the website displays content of months ago, even when refreshing the page, the page will look the same.
They also say in firefox the site is fine.

I don't want to install these windows-on-mac applications, I tried them before and it's not satisfactory at all.(works really slow)

But I would like some advice or similar experiences from other users.

What is the best solution? Advicing people to upgrade their browser?
Use another browser?

Grhhh.... windows....and always that internet explorer...

 

This is the site:
http://www.stopdierproeven.org/

How would you 'uncache' images in the I.E. browser?
Or prevent this to happen?

I usually view my site in I.E. when I get on a windows machine somewhere, and it looks good, only some users experience these problems.
I know somebody who couldn't see an image for weeks, which other users could see with no problems.

I'm not a newbie in webdesign, but this is a bit of a mysterie to me.
thanks

 

I found a reasonable explanation:

Cache problems with Internet Explorer

http://en.wikipedia.org/wiki/Troubleshooting_Wikipedia

A problem commonly reported by Microsoft Internet Explorer users relates to Wikipedia content that seems to be out-of-date. The problem usually manifests as disappearing page edits or days-old current events. This problem is almost always caused by browser caching. Almost all Web browsers temporarily store a copy of viewed Web pages on the user's computer, and almost all browsers are configured by default to display the cached copy if the user revisits the same page and it can be determined that the page has not been updated since his last visit. Usually, this process works as expected; however, some versions of Internet Explorer fail to always correctly re-download a page when it has become outdated (which may be a software bug).
(The Internet Explorer problem is not unique to Wikipedia; if you incorrectly see cached data here, you are likely seeing out-of-date pages on other sites too.)
There are three simple workarounds you should try if you encounter this problem.
Click the Refresh button in the toolbar or activate the Refresh keyboard shortcut (on Microsoft Windows computers, either F5 or Ctrl-R).
If that doesn't work, try Ctrl-F5 (i.e. hold down the Control key and then press F5); this shortcut is documented as always refreshing the page from the Internet, regardless of what is in the cache.
If neither method of refreshing works, you can manually delete all files in your cache. To do this, select "Internet Options" from the Internet Explorer "Tools" menu and then click the "Delete Files..." button. (Note that this last process may take some time if the cache has not been recently cleared.)
Finally, you might simply consider trying a different Web browser. Firefox, Netscape Navigator, and Opera are three popular alternatives available for a variety of operating systems.
Internet Explorer has been singled out in this troubleshooting section because the majority of cache-related problems are reported by Internet Explorer users, but similar issues could be found in other browsers (Netscape 7.2 had this problem). For more information about Wikipedia page caching and caching in general, see Wikipedia:Clear your cache.