Lightroom naming my files incorrectly since 3.4.1 update

[ashleykaryl]

I am suddenly having a problem getting Lightroom to use my import settings properly since the 3.4.1 update running 10.6.7. It is now naming my files incorrectly, which I just mentioned at the Adobe forums and I wondered if others here might be seeing something similar? http://forums.adobe.com/thread/867435?tstart=0

[JoeThePhotographer]

What is the Problem?

[ashleykaryl]

On import Lightroom is messing up the file renaming since 3.4.1 and adding an X in place of an underscore for no obvious reason.

[ashleykaryl]

I have found the answer to this problem but the cause is truly baffling and unexpected. My 1DsII has changed the format of the file names for some inexplicable reason and is now substituting an X in place of the original underscore. Yesterday I received a brand new computer so I did a clean install and to try and resolve this problem I created a new catalogue from scratch but the problem was still there. Then I found out why.

Lightroom is working fine but I have no idea why my 1DsII is suddenly naming files in a different format.