>>Was this a formal test, complete with test specification, or just ad hoc testing with no specification. If the former then you need to review your method of producing a test specification, if the latter then you really should consider more formal testing techniques.
>
>Oh that's right, big companies, not to mention any name here, always release big product with bug free environment. ;)

I agree with you there, I work for a small company & our reputation is on the line with each release, large companies, especially those having a close to monopoly in some areas, seem to have the freedom to release early & use the first users as testers.

>
>We did our best to release it perfectly but we missed one topic so far, which will fixed extremely fast, as usual, as this is how we work here.

My point was that it doesn't matter how many testers & how long they test for unless they have some guidance in testing, even if it's something as simple as a check list, if something is missed you simply update the procedure so it's less likely to be missed next time.

I do agree that you have a rapid response to fixes, & that is highly commendable. Much better than some large companies, who prefer to avoid the problem by redefining the fault as an "undocumented feature" so it needs no action.