Access Query displaying wierd Chinese characters

We have an Access database running on a small office network with a mixture of Access 2000 and Access 2007 machines. The database is split into a front and back end.

We have a query which, when a product code is entered, retrieves a list of customers who have bought that product and whose customer record contains a web site address, indicating that they sell online.

This query has suddenly started behaving very strangely, returning what look like Chinese characters in the web site field. If I remove the 'Is Not Null' parameter for this field, however, the web addresses display correctly and the links work. The data in the underlying table seems OK also.

I've come across some references on the web to Chinese characters displaying in tables if a database has been corrupted, but nothing about this happening in queries when the underlying data seems OK. I ran a Compact & Repair anyway, but it hasn't helped.

Does anyone have any idea what's going on and how we can fix it?
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rodomahonyAuthor Commented:
I actually worked out what the problem was shortly after posting this question. Somehow the relationship between two of the tables involved in the query had become broken - not sure how, but recreating the relationship seems to have solved it.

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rodomahonyAuthor Commented:
As stated, I worked out what was causing the problem shortly after posting the question, and before anyone else had posted a reply.
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