gistfile1.txt

$ samtools flagstat 4.50.bam 
9823052 in total
0 QC failure
0 duplicates
3461351 mapped (35.24%)
9823052 paired in sequencing
9823052 read1
0 read2
9823052 properly paired (100.00%)
2200437 with itself and mate mapped
1260914 singletons (12.84%)
259967 with mate mapped to a different chr
259655 with mate mapped to a different chr (mapQ>=5)

deiros@stornext7:/stornext/snfs5/next-gen/drio-scratch/bfast_related/bwaaln.testing/ANG_RC_LCA_K86_3_1sA_01003280864_2/bf2
$ samtools flagstat 4.25.bam 
9823052 in total
0 QC failure
0 duplicates
4562039 mapped (46.44%)
9823052 paired in sequencing
0 read1
9823052 read2
9823052 properly paired (100.00%)
2200437 with itself and mate mapped
2361602 singletons (24.04%)
259967 with mate mapped to a different chr
254225 with mate mapped to a different chr (mapQ>=5)