random 404 for items inside dynamic HTML content

my TUX is acting weird. It is randomly dropping static contents out of
dynamic pages.

the trouble is.....
tux is forwarding to tomcat for requests it cant handle
but when that happens, and if the HTML returned contains static
contents, say, gif images and CSS stylesheet that need to be handled
by TUX, then some of those will get a 404 reply from TUX, randomly!

As a result, i keep on getting missing graphics in my returned pages in my browser

For pure static contents, i.e. static html with static grphics, things
are just fine.

I looked into the actually HTTP conversation, and noticed
that TUX was returning 404 for those missing static content. But they
ARE valid files, as i can right click on those broken pic icons and
ask the browser to "show picture", and it will display it fine.

Moreover, it is not always the same static content that gets
dropped. so, for example, sometimes it can be picture1 missing, other
times it can be picture2, and so on.

looking thru the TUX logs, i notice that these dropped contents are NOT
even logged!

Also, if i do a back and then forward in the browser, then the page
will show correctly displaying all static content inside. At the same
time, the log will show the previously unloaded graphics being
requested successfully.

I am using Redhat 8.0, kernel 2.4.20-20.8, tux-2.2.7-3. Dynamic
content comes from tomcat-4.1.24.

I have not altered the TUX settings from the default, so the max
connections should still be 1000.

And i have tried these on both IE6/Windows and Firebird/RH8 both
displaying this same abnormality.

It seems to me that TUX will randomly reply incorrect 404s for static
contents only while delegating to a user space server for html.

Any ideas?