?rant
We bought an expensive middleware which helped development speed and stability a lot. Something did not work and after a week I located the bug in the middleware. Support was adequate and the bug got fixed after my report.
I'm not mad at the developers, because bugs happen, and this one was hard to catch, even with tests.
On the other hand I have to explain my boss what took so much time.
It really wasn't my fault, but I also don't want to shame the middleware company, because it will make it harder for me to buy their stuff (and I quite like their products) or even any software at all.