Sometimes nothing happens (button stays, number is the same) and sometimes the number is increased by one. But the mysql table is updated EVERY time.
If I click "refresh page" AFTER nothing was happened, the number is increased by one.
I've made more investigation and:
That example page is working on the Explorer! And with Chrome. But not with Firefox! (Firefox now updated to 4.01)
With Explorer and Chrome the number is increasing every time I click the button.
On my site, the problem is happening with every browser! Ok, that example code is not 100% equally constructed like a page on my site, but it should be close enough.
BUT it is strange thing also that my site's users haven't (yet..) reported any problems about this... so could this be happening in my end only?
I've tried with firefox, explorer, chorme, with three different computers (xp, vista). But the problem stays.