Ask LANDesk support for an official statement if you need one. General rule with SQL service packs is that it will work, but until there is a new LANDesk release or Service Pack, the product will not undergo full regression testing in order to be classed as 'supported'.
As Frank syas, it works today. If you encounter an issue and LANDesk have an problems with the fact you are SP1, then proving that issue exists in the non-service packed database version will mean it will be supported.
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