First of all, I'm of the mindset that it's probably best to not list every issue fixed, and especially not list every bug reported publicly. Many bugs reports are bogus, and it's certainly possible for a large number of "reported issues" to detract from the true quality of the current version. For a new product I would never make this information public. But that's neither here nor there since in the OP's situation, they are public. So, let's go with that.
What I would do is based on a Freakonomics episode where a company (furniture company, or appliance company, whatever it doesn't matter) inadvertantly stopped advertising in some of their major-market newspapers. While it was an intern's mistake that this happened, what they found was that there was no impact (i.e. no reduction) of sales in those markets. So while a logical person would say, "Let's scrap advertising in those markets forever and keep the cash," the people in charge instead said "but we *have* to advertise." Preserving expectations/status-quo won out over rational thinking, and the difference was millions of dollars.
I would put a challenge to the marketing and sales departments. If they think public disclosure is hindering sales, let them prove it. Pull the publicly-visible bug tracking for a period of time and if the marketing and sales people are right, sales will go up compared to similar periods in previous years. If, however, customers are unhappy with the "secrecy", take that into account as a ding against the approach. But I'd be firm -- if you pull the bug info, the sales better increase.
Of course, before you issue a heavy-handed challenge to M&S, maybe just ask your existing customers about it. "We are considering pulling our publicly-visible bug tracking/reporting but have no plans to change our update cycle, just the reporting. How does this impact your business, and how does it impact your decision to use Product X?" Use that as a basis to continue current practice, or start the M&S challenge.
I also acknowledge I am anothing but a keyboard jockey in this horse race.