Actually this happens to me too but not when I use the floppy install.  It appears to be related to the CD driver.

I reported this sometime this summer I recall, along with another person.

People suggested that perhaps DMA being on or off was a issue on the CD drive but my motherboard didn't have DMA support until about a month or two ago when Russ added it to sources.



On 11/21/05, Russ Cox <rsc@swtch.com> wrote:
> cacheLocalData: addr=229 type got 0 exp 0: tag got 0 exp 50dd4ff
> cacheLocalData: addr=229 type got 0 exp 0: tag got 0 exp 50dd4ff
> cacheLocalData: addr=229 type got 0 exp 0: tag got 0 exp 50dd4ff
> cacheLocalData: addr=229 type got 0 exp 0: tag got 0 exp 50dd4ff
> cacheLocalData: addr=229 type got 0 exp 0: tag got 0 exp 3e9d4a9b
> replica/applylog: appending to db: block label mismatch

is your disk failing?

russ