OKay, I had this occuring in my migration from 3.5CE to 3.7CE, but only when I started to update/make changes to the reports via ireport (3.7.3). Previously I copied the JRML file and pasted into 3.7.3 and it ran with out a problem. But when I started to edit it and change the reports I was running, the datafields started corrupting the same as the ones you mentioned, "[@dks434" and so on. But strangely enough I stumbled accross the fix (or atleast it fixed it for me). I went into the dataset of the report that was causing the problem, and edited the query, I then did a read fields and at this point my items that were in the field type column changed. Click ok to commit this update, and hey presto, no more corrupted entries. Of course I was trying other things to fix it ,but none of them had this level of visible change to something that might actaully be about data mis-formating. Hope this helps and let me and others know if it does. -lasinir