Defraggler shows two groups of information in the lower left pane - the analysis and current sections.
Initially the alalysis percent of fragmentation is calculated and then the current percent of fragmentation starts to drop towards 0 during the process of defragmentation.
However the analysis percent of fragmentation starts to drop together with the current percent of fragmentation, instead of remaining constant.
To sum up: The two lower-left pane labels about percentage of fragmentation get updated instead of only the bottom one.
Windows 7 SP1 32bit
Defraggler 2.09 (latest to date)