Existing users, 
From the "BLOG" of the developer, verbatim:
>>>Posted January 5, 2008
mainmenu 1.7.2 and 10.5.x
although most of mainmenu’s functions do work under 10.5.x, there are a number of things that may have problems running/won’t work, e.g flush lookupd cache, maintenance scripts… BUT nothing dangerous. hopefully there’ll be time to put out a proper update for leopard in the near future. thanks<<<
Nothing dangerous. Right. Please don't be so cavalier with our Mac maintenance programs. I loved this little app, but I don't dare use it. Sorry.
MainMenu
Fix, clean, maintain and manage your system.
Version: 2.0.4
Developer's obvious disinterest
Feedback Type: Usage Tip
Contributed by: jjjazzz--2008 Thursday, March 13 2008 @ 04:44 PM PDT
Product Platform: MacOSX
Used Product For: Over One Year
Comments
Developer's obvious disinterest - Jon_Link_871
cavalier: showing a lack of proper concern; offhand.It isn't cavalier at all. The post says that it is safe to use, but that some features don't work. That means was tested.
Now, your review *was* cavalier.
Wednesday, March 19 2008 @ 09:06 AM PDT
Developer's obvious disinterest - rkdk
jjjazzz,1.7.2 was tested on Leopard, in fact it was developed on a 10.5 (not final) beta build.
The cron/maintenance scripts, with errors such as "command not found", and the old Tiger lookupd cache refresh command not existing (or rather under a different name) in 10.5, both 100% harmless issues.
Wanted to put out an update but there was really no time.
Apologies.
Friday, March 21 2008 @ 02:48 AM PDT
Developer's obvious disinterest - rkdk
Also, noticed you mentioned in one of your feedbacks for leopard cache cleaner that you can no longer trust MainMenu... Hope for your system's well-being, that LCC (and OnyX too I believe, last time i checked) has done away with it's custom authorization panel/method.Friday, March 21 2008 @ 02:54 AM PDT
Ignore the harsh/childish comment above!! - leftblank-:o)
If you don't dare use it, that's fine .. only you can take responsibility for what you do on your Macs.But to moan at free high-quality software that is bloody useful is so counter-productive: would you carry on updating free software if this was the prevailing attitude?
To Santa software: thanks for MainMenu, imho the best of the maintenance apps ... and thanks for the new update too!
;o)
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Wednesday, March 19 2008 @ 07:11 AM PDT