When moving page items, the responsiveness of InDesign CS5 is slower than previous versions.
Do one or more of the following:
An issue involving display of pages when transparency is involved and thumbnails are being shown in the Pages panel was addressed in the 7.0.4 release:
Open the Pages Panel options and deselect Show Thumbnails, which is turned on by default.
Choose Preferences > File Handling. Then deselect Always Save Preview Images With Documents.
Choose Preferences > Interface. Then set Live Screen Drawing mode to either Delayed or Never.
Choose Window > Output > Preflight. Then deselect Live Preflight.
Alternatively, ensure that you select only the smallest number of the most important preflight rules.