Browser ISSUES

Here's one I have yet to figure out. I began to notice random issues with the Firefox client, particularly PHP uploads. When I select a file through the browse feature on the form sometimes it fails to populate the form box. Try to send it and it is if you had selected nothing. I usually remedey this by copying to the desktop and then upload from there, but it's not 100%. This one has me mildly concerned for the end user, as my last resource is to fall back to a windows box (using the same browser). However, it's not common but it does happen.
Since I am on Browser ISSUES in Ubuntu I also discovered the 3rd party vendor logmein's browser utilities fail to install on my Ubuntu box. We use that to maintain our clients servers, another one where I fall back to Windows.

If there is any input on these issues i'd love to hear them!

Thanks,