It has always been hard to clearly separate the bug reports and support categories. I don't think we need stricter rules for this, because in the end it doesn't really matter in which of the two they post. Looking at the
stats I'd say merge them, both sections aren't very active anyway, it will be easier to keep track when merged IMO. Splitting them made more sense in the past when more people seemed to be posting and there were detailed bug reports. These days almost all the real bug reports seem to be handled directly over mail to Patchou or posted in the private beta forum.
For the other part, I think you're right...
"
Problem downloading/installing/running Messenger Plus!? Read This!"
Could completely cover all these threads:
Have SweetIM and/or SmileyCentral installed? PLEASE READ
Solution to problems installing Msg Plus! Live- READ BEFORE POSTING
[Solution] Messenger Plus! is not a valid Win32 application
And could also cover
MenthiX's reply to Another little hint for the ones who can't start Plus! at all
/ 
