Man, I love the web. →[More:]
My dishwasher has leaked twice in the last few weeks, water coming out of the front towards the end of the cycle. I couldn't work out why and, although the dishwasher's under a 5 year guarantee, of which over 4 years remain, I wanted to make sure it wasn't anything I was doing before calling out the service engineer.
Googling 'intermittent dishwasher leak' led me to a forum where someone with a Bosch dishwasher (mine is a Siemens, they are related companies) had the exact same problem and it was caused by her cheap floppy dollar store cutting mats blocking a little round grate half-way up the right-hand side of the dishwasher. Her expensive rigid cutting board didn't block it but the flimsiness of the dollar store one made it stick over the grate and block it, causing the dishwasher to leak.
Lo and behold, that's where I put my cheap floppy 99p store cutting mats too! And my dishewasher has the exact same little grate half-way up the right-hand side.
I thought it had to be something I'd done, because it didn't leak every time (as it would if it was a loose connection), but I couldn't for the life of me even begin to guess what it might be.
Yay internets!