Try again.
I did it now and via URL you reported it downloaded selftimer_0_436837.0.6_armel.deb
I have however installed it directly from Store, and btw even though the package name is different: selftimer_0.0.6_armel.selftimer, they are exactly the same (checked with md5sum)

If you don't see the 0.6 version yet, it must be some caching/delay effect with Nokia's worldwide mirrors