Strange problem w/ IBX 5.03...bug?

Hi All,

I just recently updated our development machines to IBX 5.03.

After compiling my app, (which uses some of the IBX Admin tools, but no
other IBTables, etc.), our IB Clients can no longer connect to the database
on the Server.  We get an error message 'Unavailable Database'.

After sending out several messages to sqlservers newsgroup, w/ no good
responses, we decided to roll back the only change made to our app.

So, we took out IBX 5.03, rolled back to our old version of IBX and everything is back to normal and clients can connect.

Can anyone tell me if they've had this experience and what would cause it?