Uploads go to the wrong category

Hi,

We have nine separate categories grouped under one particular weblog. Up until now, we could upload new entries into any category they belonged to.

Now, when I try to upload a new entry into a category, as I have done often in the past, the new entry gets uploaded, but it is being placed in an incorrect category.

We are using the version that comes installed with the Tiger Server OS.

Can someone comment about this?

Thank you.

Frank Szot