In my current R8.5 Notes client upgrade the pilot clients have a veriety of builds. To help keep track of it all, Here is a partial list of Lotus Notes revision numbers.
20090615.0130 (Release 8.5.1)
20090920.1010 (Release 8.5.1)
20090929.1223 (Release 8.5.1)
20091002.1006 (Release 8.5.1 FP1)
20101103.0200-FP1 (Release 8.5.2FP1)
20100524.0930-FP3 (Release 8.5.2FP3)
20100726.1445_FP4 (Release 8.5.2FP4)
20100811.1131 (Release 8.5.2)
20101103.0200-FP1 (Release 8.5.2FP1)
20110711.1400-FP3 (Release 8.5.2FP3)
